---
schema: "interfacedelta-service-md/1"
target_key: "sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8"
origin: "https://www.marian.coach"
protocols: ["mcp","a2a"]
observed_at: "2026-11-11T05:05:23.001Z"
generated_at: "2026-11-15T07:23:57.013Z"
record_url: "https://interfacedelta.com/atlas/sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8"
record_api: "https://interfacedelta.com/api/v1/record/services/sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8"
source: "InterfaceDelta atlas"
license_note: "Use of this record is governed by https://interfacedelta.com/terms."
---

# Service record: https://www.marian.coach

## Identity
- Origin: https://www.marian.coach
- Endpoints: https://www.marian.coach/mcp, https://www.marian.coach/a2a/v1
- Protocols: mcp, a2a
- Registry names: coach.marian/eng-leadership-toolkit
- First retained observation: 2026-11-11T05:05:23.001Z
- Latest observation: 2026-11-11T05:05:23.001Z

## Tools
MCP tools, OpenAPI operations, WebMCP tools and A2A skills; excludes prompts and resources.
Total capabilities: 20; non-tool capabilities: 0.
- Tool 1: assess\_team\_lead\_readiness (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 2: build\_mentoring\_business\_case (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 3: calculate\_developer\_value (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 4: calculate\_engineering\_manager\_value (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 5: choose\_mentor\_coach\_or\_advisor (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 6: estimate\_coaching\_cost (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 7: get\_engineering\_leadership\_benchmarks (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 8: get\_first\_time\_manager\_guidance (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 9: get\_one\_on\_one\_playbook (a2a); inputs: none shown; inputs omitted: 0; annotations: {}
- Tool 10: assess\_team\_lead\_readiness (mcp); inputs: answers, context; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 11: build\_mentoring\_business\_case (mcp); inputs: alternatives, at\_risk\_attrition, avg\_salary\_eur, company, context, decide\_by, delayed\_revenue\_eur, first\_time\_in\_role; inputs omitted: 9; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 12: calculate\_developer\_value (mcp); inputs: context, level, scores; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 13: calculate\_engineering\_manager\_value (mcp); inputs: context, level, scores, track; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 14: choose\_mentor\_coach\_or\_advisor (mcp); inputs: context, situation; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 15: estimate\_coaching\_cost (mcp); inputs: client\_role, coach\_seniority, coaching\_type, context, scope, territory; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 16: get\_engineering\_leadership\_benchmarks (mcp); inputs: context, topic; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 17: get\_first\_time\_manager\_guidance (mcp); inputs: context; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 18: get\_more\_tools (mcp); inputs: context; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 19: get\_one\_on\_one\_playbook (mcp); inputs: context, situation; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
- Tool 20: get\_started (mcp); inputs: context; inputs omitted: 0; annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}
Tools omitted: 0.

## Effect readings (AI)
- Tool 11 (build\_mentoring\_business\_case): ◇ AI reading; state: counted; none (confidence 0.83); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 12 (calculate\_developer\_value): ◇ AI reading; state: counted; none (confidence 0.8); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 13 (calculate\_engineering\_manager\_value): ◇ AI reading; state: counted; none (confidence 0.8); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 15 (estimate\_coaching\_cost): ◇ AI reading; state: counted; none (confidence 0.82); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 16 (get\_engineering\_leadership\_benchmarks): ◇ AI reading; state: counted; reads (confidence 0.85); lens: side-effects@1; model: claude-haiku-5.5.
- Tool 17 (get\_first\_time\_manager\_guidance): ◇ AI reading; state: counted; none (confidence 0.8); lens: side-effects@1; model: claude-haiku-5.5.

## Change history
No changes recorded in the retained history.

## Payment rails
- Protocols observed: none.
- HTTP 402 seen in retained observations: false.

## Not covered
- We don't call tools.
- We don't rate or certify.
- We don't publish prices.
- We cover only what was observed.

## Evidence
- Identity: observed / declared; observation time: 2026-11-11T05:05:23.001Z.
- Tools: declared; observation time: 2026-11-11T05:05:23.001Z.
- Effect readings (AI): AI reading; observation time: 2026-11-11T05:05:23.001Z.
- Change history: observed; observation time: 2026-11-11T05:05:23.001Z; change observation times: none.
- Payment rails: observed; observation time: 2026-11-11T05:05:23.001Z.

```json
{
  "schema": "interfacedelta-service-md/1",
  "target_key": "sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8",
  "origin": "https://www.marian.coach",
  "protocols": [
    "mcp",
    "a2a"
  ],
  "observed_at": "2026-11-11T05:05:23.001Z",
  "generated_at": "2026-11-15T07:23:57.013Z",
  "record_url": "https://interfacedelta.com/atlas/sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8",
  "record_api": "https://interfacedelta.com/api/v1/record/services/sha256:f3e86c6d172e1c0c230a2585e45552867de1d9c19cb08c1c10062c62f04430e8",
  "source": "InterfaceDelta atlas",
  "license_note": "Use of this record is governed by https://interfacedelta.com/terms.",
  "identity": {
    "origin": "https://www.marian.coach",
    "endpoints": [
      "https://www.marian.coach/mcp",
      "https://www.marian.coach/a2a/v1"
    ],
    "protocols": [
      "mcp",
      "a2a"
    ],
    "registry_names": [
      "coach.marian/eng-leadership-toolkit"
    ],
    "first_retained_observation": "2026-11-11T05:05:23.001Z",
    "latest_observation": "2026-11-11T05:05:23.001Z"
  },
  "tools": [
    {
      "name": "assess_team_lead_readiness",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "build_mentoring_business_case",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "calculate_developer_value",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "calculate_engineering_manager_value",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "choose_mentor_coach_or_advisor",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "estimate_coaching_cost",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "get_engineering_leadership_benchmarks",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "get_first_time_manager_guidance",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "get_one_on_one_playbook",
      "kind": "a2a.skill",
      "protocol": "a2a",
      "inputs": [],
      "inputs_omitted": 0,
      "annotations": {},
      "effects": null
    },
    {
      "name": "assess_team_lead_readiness",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "answers",
        "context"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": null
    },
    {
      "name": "build_mentoring_business_case",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "alternatives",
        "at_risk_attrition",
        "avg_salary_eur",
        "company",
        "context",
        "decide_by",
        "delayed_revenue_eur",
        "first_time_in_role"
      ],
      "inputs_omitted": 9,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "none",
            "confidence": 0.83
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "calculate_developer_value",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context",
        "level",
        "scores"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "none",
            "confidence": 0.8
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "calculate_engineering_manager_value",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context",
        "level",
        "scores",
        "track"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "none",
            "confidence": 0.8
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "choose_mentor_coach_or_advisor",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context",
        "situation"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": null
    },
    {
      "name": "estimate_coaching_cost",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "client_role",
        "coach_seniority",
        "coaching_type",
        "context",
        "scope",
        "territory"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "none",
            "confidence": 0.82
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_engineering_leadership_benchmarks",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context",
        "topic"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
        "state": "counted",
        "classes": [
          {
            "class": "reads",
            "confidence": 0.85
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_first_time_manager_guidance",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context"
      ],
      "inputs_omitted": 0,
      "annotations": {
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        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": {
        "marker": "◇ AI reading",
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          {
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            "confidence": 0.8
          }
        ],
        "lens": "side-effects@1",
        "model": "claude-haiku-5.5"
      }
    },
    {
      "name": "get_more_tools",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": null
    },
    {
      "name": "get_one_on_one_playbook",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context",
        "situation"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": null
    },
    {
      "name": "get_started",
      "kind": "mcp.tool",
      "protocol": "mcp",
      "inputs": [
        "context"
      ],
      "inputs_omitted": 0,
      "annotations": {
        "readOnlyHint": true,
        "destructiveHint": false,
        "idempotentHint": true,
        "openWorldHint": false
      },
      "effects": null
    }
  ],
  "capability_count": 20,
  "non_tool_capability_count": 0,
  "tool_count_scope": "MCP tools, OpenAPI operations, WebMCP tools and A2A skills; excludes prompts and resources.",
  "tools_omitted": 0,
  "tools_state": "recorded",
  "changes": [],
  "payment_rails": {
    "protocols": [],
    "http_402_seen": false
  },
  "not_covered": [
    "We don't call tools.",
    "We don't rate or certify.",
    "We don't publish prices.",
    "We cover only what was observed."
  ],
  "evidence": [
    {
      "section": "Identity",
      "classes": [
        "observed",
        "declared"
      ],
      "observed_at": "2026-11-11T05:05:23.001Z"
    },
    {
      "section": "Tools",
      "classes": [
        "declared"
      ],
      "observed_at": "2026-11-11T05:05:23.001Z"
    },
    {
      "section": "Effect readings (AI)",
      "classes": [
        "AI reading"
      ],
      "observed_at": "2026-11-11T05:05:23.001Z"
    },
    {
      "section": "Change history",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-11T05:05:23.001Z",
      "observation_times": []
    },
    {
      "section": "Payment rails",
      "classes": [
        "observed"
      ],
      "observed_at": "2026-11-11T05:05:23.001Z"
    }
  ]
}
```