sourcemap-retrace-mcp

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ingest_telemetry_payload

Decode minified stack traces from Sentry, Bugsnag, or Datadog crash dumps by providing the payload and sourcemap directory, returning fully retraced stack frames.

Instructions

Directly ingest Sentry, Bugsnag, or Datadog crash dumps and return fully retraced stack frames.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "payload": "<payload>",
      "sourcemapDir": "<sourcemapDir>"
    },
    "name": "ingest_telemetry_payload"
  }
}

Input Schema

Name	Required	Description
`payload`	Yes	The raw JSON string of the crash telemetry event
`inAppOnly`	No	Only return frames marked as part of the application source code
`sourcemapDir`	Yes	Directory containing corresponding .map files

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.2.0Aug 5, 2026

TDQS

A3.5/5.0

Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description bears full responsibility. It states the core behavior but does not disclose whether data is persisted, what happens on invalid input, or any side effects. This is insufficient for a tool with no annotation support.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence that immediately leads with the action and resource. It is concise, front-loaded, and contains no redundant information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has no output schema and no annotations, so the description must cover return values and workflow context. It mentions 'fully retraced stack frames' as the return, but lacks details about the processing pipeline, failure modes, or how it fits among siblings. It is minimally complete but not rich.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so all parameters are already documented. The description adds no extra parameter semantics or context beyond what the schema provides. The baseline of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('ingest'), names concrete resources (Sentry, Bugsnag, Datadog crash dumps), and states the output ('fully retraced stack frames'). This clearly distinguishes it from sibling tools like retrace_stack, which likely operates on already-parsed stacks.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for raw crash dumps from specific providers, but provides no explicit when-to-use vs. alternatives, no exclusions, and no mention of sibling tools. The context is clear but not actionable for choosing this over retrace_stack or others.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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