{
  "schema": "https://agent-atoms.com/schemas/atom-v1.json",
  "type": "tool-definition",
  "id": "git-blame",
  "version": "1.0.0",
  "name": "git-blame",
  "description": "Per-line authorship for a file.",
  "tool_spec": {
    "function_name": "git_blame",
    "summary": "Annotate each line with its last commit.",
    "parameters": {
      "path": { "type": "string", "description": "File path", "required": true },
      "rev": { "type": "string", "description": "Revision to blame (default: HEAD)", "required": false }
    },
    "returns": { "type": "array", "description": "Annotated lines." },
    "side_effects": ["fs-read", "exec"]
  }
}