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Get Operation Tree

get-operation-tree
Read-onlyIdempotent

Projects a semantic IOperation tree for a source location, showing operation kinds, types, constant-value presence and source locations so you can inspect the code's semantic structure.

Instructions

Projects a semantic IOperation tree with operation kinds, types, constant-value presence and source locations. Use this to inspect the semantic structure at a source location; use analyze-data-flow for variable-flow sets or get-control-flow-graph for branches and successors. If the selected syntax node has no operation, the first immediate child with an operation is used. Echo the current expectedSnapshot. Defaults to 200 total nodes and maxDepth 8, counting the root at depth zero. Check the result and node truncated flags; nodesLimit zero returns a null root.

Input Schema

NameRequiredDescriptionDefault
locationYesThe selected location.
maxDepthNoThe maximum traversal depth.
workspaceNoProvide workspaceId, alias, path, or any combination.
nodesLimitNoThe optional maximum total number of projected operation nodes.
expectedSnapshotNoEcho the snapshot returned with the data or transaction state used to construct this request.

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed7 schema fields changedv1.0.5
    • addedInput schema / $defs
      Added value: +{
      +  "document": {
      +    "properties": {
      +      "documentId": {
      +        "description": "Workspace-local document ID.",
      +        "type": "string"
      +      },
      +      "path": {
      +        "description": "Workspace-relative path.",
      +        "type": "string"
      +      },
      +      "project": {
      +        "description": "Disambiguates documents with matching paths or IDs.",
      +        "properties": {
      +          "name": {
      +            "type": "string"
      +          },
      +          "path": {
      +            "description": "Workspace-relative path.",
      +            "type": "string"
      +          },
      +          "projectId": {
      +            "type": "string"
      +          },
      +          "targetFramework": {
      +            "type": "string"
      +          }
      +        },
      +        "type": [
      +          "object",
      +          "null"
      +        ]
      +      }
      +    },
      +    "type": "object"
      +  }
      +}
    • addedInput schema / properties / location / properties / selection / properties / document / $ref
      Added value: +"#/$defs/document"
    • removedInput schema / properties / location / properties / selection / properties / document / properties
      Removed value: -{
      -  "documentId": {
      -    "description": "Workspace-local document ID.",
      -    "type": "string"
      -  },
      -  "path": {
      -    "description": "Workspace-relative path.",
      -    "type": "string"
      -  },
      -  "project": {
      -    "$ref": "#/properties/location/properties/span/properties/document/properties/project",
      -    "description": "Disambiguates documents with matching paths or IDs."
      -  }
      -}
    • removedInput schema / properties / location / properties / selection / properties / document / type
      Removed value: -"object"
    • addedInput schema / properties / location / properties / span / properties / document / $ref
      Added value: +"#/$defs/document"
    • removedInput schema / properties / location / properties / span / properties / document / properties
      Removed value: -{
      -  "documentId": {
      -    "description": "Workspace-local document ID.",
      -    "type": "string"
      -  },
      -  "path": {
      -    "description": "Workspace-relative path.",
      -    "type": "string"
      -  },
      -  "project": {
      -    "description": "Disambiguates documents with matching paths or IDs.",
      -    "properties": {
      -      "name": {
      -        "type": "string"
      -      },
      -      "path": {
      -        "description": "Workspace-relative path.",
      -        "type": "string"
      -      },
      -      "projectId": {
      -        "type": "string"
      -      },
      -      "targetFramework": {
      -        "type": "string"
      -      }
      -    },
      -    "type": [
      -      "object",
      -      "null"
      -    ]
      -  }
      -}
    • removedInput schema / properties / location / properties / span / properties / document / type
      Removed value: -"object"
  2. Changed1 schema field changedv1.0.4
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$defs": {
      +    "warningInfo": {
      +      "properties": {
      +        "code": {
      +          "description": "The stable machine-readable warning code.",
      +          "type": "string"
      +        },
      +        "message": {
      +          "description": "The human-readable warning message.",
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "code",
      +        "message"
      +      ],
      +      "type": "object"
      +    }
      +  },
      +  "oneOf": [
      +    {
      +      "properties": {
      +        "data": {
      +          "description": "Tool-specific result payload.",
      +          "properties": {
      +            "root": {
      +              "description": "The projected root operation.",
      +              "properties": {
      +                "children": {
      +                  "description": "The projected child operations.",
      +                  "items": {
      +                    "properties": {
      +                      "children": {
      +                        "$ref": "#/properties/request/properties/value/properties/root/properties/children",
      +                        "description": "The projected child operations.",
      +                        "items": {}
      +                      },
      +                      "hasConstantValue": {
      +                        "description": "Whether the operation has a constant value.",
      +                        "type": "boolean"
      +                      },
      +                      "kind": {
      +                        "description": "The Roslyn operation kind.",
      +                        "type": "string"
      +                      },
      +                      "location": {
      +                        "$ref": "#/properties/request/properties/value/properties/root/properties/location",
      +                        "description": "The exact source location of the operation."
      +                      },
      +                      "truncated": {
      +                        "description": "Whether child nodes were truncated.",
      +                        "type": "boolean"
      +                      },
      +                      "type": {
      +                        "description": "The associated type display name, when available.",
      +                        "type": [
      +                          "string",
      +                          "null"
      +                        ]
      +                      }
      +                    },
      +                    "required": [
      +                      "kind"
      +                    ],
      +                    "type": "object"
      +                  },
      +                  "type": "array"
      +                },
      +                "hasConstantValue": {
      +                  "description": "Whether the operation has a constant value.",
      +                  "type": "boolean"
      +                },
      +                "kind": {
      +                  "description": "The Roslyn operation kind.",
      +                  "type": "string"
      +                },
      +                "location": {
      +                  "description": "The exact source location of the operation.",
      +                  "properties": {
      +                    "column": {
      +                      "description": "The one-based column number.",
      +                      "type": "integer"
      +                    },
      +                    "document": {
      +                      "description": "The resolved document.",
      +                      "properties": {
      +                        "documentId": {
      +                          "description": "The document identifier.",
      +                          "type": "string"
      +                        },
      +                        "path": {
      +                          "description": "The normalized document path.",
      +                          "type": "string"
      +                        },
      +                        "projectId": {
      +                          "description": "The owning project identifier.",
      +                          "type": "string"
      +                        }
      +                      },
      +                      "required": [
      +                        "documentId",
      +                        "path",
      +                        "projectId"
      +                      ],
      +                      "type": [
      +                        "object",
      +                        "null"
      +                      ]
      +                    },
      +                    "line": {
      +                      "description": "The one-based line number.",
      +                      "type": "integer"
      +                    },
      +                    "selector": {
      +                      "description": "The canonical selector that can resolve this source location again.",
      +                      "properties": {
      +                        "span": {
      +                          "properties": {
      +                            "document": {
      +                              "description": "Provide exactly one of path or documentId.",
      +                              "properties": {
      +                                "documentId": {
      +                                  "description": "Workspace-local document ID.",
      +                                  "type": [
      +                                    "string",
      +                                    "null"
      +                                  ]
      +                                },
      +                                "path": {
      +                                  "description": "Workspace-relative path.",
      +                                  "type": [
      +                                    "string",
      +                                    "null"
      +                                  ]
      +                                },
      +                                "project": {
      +                                  "description": "Disambiguates documents with matching paths or IDs.",
      +                                  "properties": {
      +                                    "name": {
      +                                      "type": [
      +                                        "string",
      +                                        "null"
      +                                      ]
      +                                    },
      +                                    "path": {
      +                                      "description": "Workspace-relative path.",
      +                                      "type": [
      +                                        "string",
      +                                        "null"
      +                                      ]
      +                                    },
      +                                    "projectId": {
      +                                      "type": [
      +                                        "string",
      +                                        "null"
      +                                      ]
      +                                    },
      +                                    "targetFramework": {
      +                                      "type": [
      +                                        "string",
      +                                        "null"
      +                                      ]
      +                                    }
      +                                  },
      +                                  "type": [
      +                                    "object",
      +                                    "null"
      +                                  ]
      +                                }
      +                              },
      +                              "type": "object"
      +                            },
      +                            "range": {
      +                              "description": "Zero-based UTF-16 range.",
      +                              "properties": {
      +                                "length": {
      +                                  "description": "UTF-16 code-unit length.",
      +                                  "maximum": 2147483647,
      +                                  "minimum": 0,
      +                                  "type": "integer"
      +                                },
      +                                "start": {
      +                                  "description": "Zero-based UTF-16 offset.",
      +                                  "maximum": 2147483647,
      +                                  "minimum": 0,
      +                                  "type": "integer"
      +                                }
      +                              },
      +                              "type": "object"
      +                            }
      +                          },
      +                          "required": [
      +                            "document",
      +                            "range"
      +                          ],
      +                          "type": "object"
      +                        }
      +                      },
      +                      "required": [
      +                        "span"
      +                      ],
      +                      "type": [
      +                        "object",
      +                        "null"
      +                      ]
      +                    },
      +                    "snapshot": {
      +                      "description": "The exact immutable workspace snapshot associated with this location.",
      +                      "properties": {
      +                        "snapshotId": {
      +                          "format": "uuid",
      +                          "type": "string"
      +                        },
      +                        "transactionRevision": {
      +                          "type": [
      +                            "integer",
      +                            "null"
      +                          ]
      +                        },
      +                        "workspaceEpoch": {
      +                          "type": "integer"
      +                        },
      +                        "workspaceId": {
      +                          "format": "uuid",
      +                          "type": "string"
      +                        }
      +                      },
      +                      "required": [
      +                        "workspaceId",
      +                        "workspaceEpoch",
      +                        "snapshotId",
      +                        "transactionRevision"
      +                      ],
      +                      "type": "object"
      +                    },
      +                    "span": {
      +                      "description": "The resolved text span.",
      +                      "properties": {
      +                        "length": {
      +                          "description": "UTF-16 code-unit length.",
      +                          "maximum": 2147483647,
      +                          "minimum": 0,
      +                          "type": "integer"
      +                        },
      +                        "start": {
      +                          "description": "Zero-based UTF-16 offset.",
      +                          "maximum": 2147483647,
      +                          "minimum": 0,
      +                          "type": "integer"
      +                        }
      +                      },
      +                      "type": [
      +                        "object",
      +                        "null"
      +                      ]
      +                    }
      +                  },
      +                  "required": [
      +                    "snapshot"
      +                  ],
      +                  "type": [
      +                    "object",
      +                    "null"
      +                  ]
      +                },
      +                "truncated": {
      +                  "description": "Whether child nodes were truncated.",
      +                  "type": "boolean"
      +                },
      +                "type": {
      +                  "description": "The associated type display name, when available.",
      +                  "type": [
      +                    "string",
      +                    "null"
      +                  ]
      +                }
      +              },
      +              "required": [
      +                "kind"
      +              ],
      +              "type": [
      +                "object",
      +                "null"
      +              ]
      +            },
      +            "truncated": {
      +              "description": "Whether the tree was truncated.",
      +              "type": "boolean"
      +            }
      +          },
      +          "type": [
      +            "object",
      +            "null"
      +          ]
      +        },
      +        "ok": {
      +          "const": true,
      +          "description": "Whether the tool invocation succeeded."
      +        },
      +        "snapshot": {
      +          "description": "Exact immutable workspace snapshot associated with the result, when available.",
      +          "properties": {
      +            "snapshotId": {
      +              "format": "uuid",
      +              "type": "string"
      +            },
      +            "transactionRevision": {
      +              "type": [
      +                "integer",
      +                "null"
      +              ]
      +            },
      +            "workspaceEpoch": {
      +              "type": "integer"
      +            },
      +            "workspaceId": {
      +              "format": "uuid",
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "workspaceId",
      +            "workspaceEpoch",
      +            "snapshotId",
      +            "transactionRevision"
      +          ],
      +          "type": "object"
      +        },
      +        "warnings": {
      +          "description": "Non-fatal warnings the agent should consider.",
      +          "items": {
      +            "$ref": "#/$defs/warningInfo"
      +          },
      +          "type": "array"
      +        }
      +      },
      +      "required": [
      +        "ok",
      +        "data",
      +        "snapshot"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "properties": {
      +        "continuation": {
      +          "description": "Action the agent should take before retrying or continuing.",
      +          "oneOf": [
      +            {
      +              "additionalProperties": false,
      +              "properties": {
      +                "instruction": {
      +                  "description": "Agent-facing instruction explaining how to continue.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "const": "CallTool",
      +                  "description": "Action required before the original request can continue."
      +                },
      +                "tool": {
      +                  "description": "Tool to call before continuing the original request.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                }
      +              },
      +              "required": [
      +                "kind",
      +                "tool",
      +                "instruction"
      +              ],
      +              "type": "object"
      +            },
      +            {
      +              "additionalProperties": false,
      +              "properties": {
      +                "instruction": {
      +                  "description": "Agent-facing instruction explaining how to continue.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "const": "ChooseTool",
      +                  "description": "Action required before the original request can continue."
      +                },
      +                "tools": {
      +                  "description": "Allowed tool choices from which the agent must select one.",
      +                  "items": {
      +                    "description": "Name of a tool the agent may choose.",
      +                    "minLength": 1,
      +                    "type": "string"
      +                  },
      +                  "minItems": 1,
      +                  "type": "array",
      +                  "uniqueItems": true
      +                }
      +              },
      +              "required": [
      +                "kind",
      +                "tools",
      +                "instruction"
      +              ],
      +              "type": "object"
      +            },
      +            {
      +              "additionalProperties": false,
      +              "properties": {
      +                "instruction": {
      +                  "description": "Agent-facing instruction explaining how to continue.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "const": "RetryRequest",
      +                  "description": "Action required before the original request can continue."
      +                }
      +              },
      +              "required": [
      +                "kind",
      +                "instruction"
      +              ],
      +              "type": "object"
      +            },
      +            {
      +              "additionalProperties": false,
      +              "properties": {
      +                "instruction": {
      +                  "description": "Agent-facing instruction explaining how to continue.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "const": "ReviseRequest",
      +                  "description": "Action required before the original request can continue."
      +                }
      +              },
      +              "required": [
      +                "kind",
      +                "instruction"
      +              ],
      +              "type": "object"
      +            },
      +            {
      +              "additionalProperties": false,
      +              "properties": {
      +                "instruction": {
      +                  "description": "Agent-facing instruction explaining how to continue.",
      +                  "minLength": 1,
      +                  "type": "string"
      +                },
      +                "kind": {
      +                  "const": "ResolveExternally",
      +                  "description": "Action required before the original request can continue."
      +                }
      +              },
      +              "required": [
      +                "kind",
      +                "instruction"
      +              ],
      +              "type": "object"
      +            }
      +          ]
      +        },
      +        "diagnostics": {
      +          "description": "Diagnostics that explain the failed invocation.",
      +          "items": {
      +            "properties": {
      +              "id": {
      +                "description": "The diagnostic identifier.",
      +                "type": "string"
      +              },
      +              "location": {
      +                "description": "The optional source location of the diagnostic.",
      +                "properties": {
      +                  "column": {
      +                    "description": "The one-based column number.",
      +                    "type": "integer"
      +                  },
      +                  "document": {
      +                    "description": "The resolved document.",
      +                    "properties": {
      +                      "documentId": {
      +                        "description": "The document identifier.",
      +                        "type": "string"
      +                      },
      +                      "path": {
      +                        "description": "The normalized document path.",
      +                        "type": "string"
      +                      },
      +                      "projectId": {
      +                        "description": "The owning project identifier.",
      +                        "type": "string"
      +                      }
      +                    },
      +                    "required": [
      +                      "documentId",
      +                      "path",
      +                      "projectId"
      +                    ],
      +                    "type": [
      +                      "object",
      +                      "null"
      +                    ]
      +                  },
      +                  "line": {
      +                    "description": "The one-based line number.",
      +                    "type": "integer"
      +                  },
      +                  "selector": {
      +                    "description": "The canonical selector that can resolve this source location again.",
      +                    "properties": {
      +                      "span": {
      +                        "properties": {
      +                          "document": {
      +                            "description": "Provide exactly one of path or documentId.",
      +                            "properties": {
      +                              "documentId": {
      +                                "description": "Workspace-local document ID.",
      +                                "type": [
      +                                  "string",
      +                                  "null"
      +                                ]
      +                              },
      +                              "path": {
      +                                "description": "Workspace-relative path.",
      +                                "type": [
      +                                  "string",
      +                                  "null"
      +                                ]
      +                              },
      +                              "project": {
      +                                "description": "Disambiguates documents with matching paths or IDs.",
      +                                "properties": {
      +                                  "name": {
      +                                    "type": [
      +                                      "string",
      +                                      "null"
      +                                    ]
      +                                  },
      +                                  "path": {
      +                                    "description": "Workspace-relative path.",
      +                                    "type": [
      +                                      "string",
      +                                      "null"
      +                                    ]
      +                                  },
      +                                  "projectId": {
      +                                    "type": [
      +                                      "string",
      +                                      "null"
      +                                    ]
      +                                  },
      +                                  "targetFramework": {
      +                                    "type": [
      +                                      "string",
      +                                      "null"
      +                                    ]
      +                                  }
      +                                },
      +                                "type": [
      +                                  "object",
      +                                  "null"
      +                                ]
      +                              }
      +                            },
      +                            "type": "object"
      +                          },
      +                          "range": {
      +                            "description": "Zero-based UTF-16 range.",
      +                            "properties": {
      +                              "length": {
      +                                "description": "UTF-16 code-unit length.",
      +                                "maximum": 2147483647,
      +                                "minimum": 0,
      +                                "type": "integer"
      +                              },
      +                              "start": {
      +                                "description": "Zero-based UTF-16 offset.",
      +                                "maximum": 2147483647,
      +                                "minimum": 0,
      +                                "type": "integer"
      +                              }
      +                            },
      +                            "type": "object"
      +                          }
      +                        },
      +                        "required": [
      +                          "document",
      +                          "range"
      +                        ],
      +                        "type": "object"
      +                      }
      +                    },
      +                    "required": [
      +                      "span"
      +                    ],
      +                    "type": [
      +                      "object",
      +                      "null"
      +                    ]
      +                  },
      +                  "snapshot": {
      +                    "description": "The exact immutable workspace snapshot associated with this location.",
      +                    "properties": {
      +                      "snapshotId": {
      +                        "format": "uuid",
      +                        "type": "string"
      +                      },
      +                      "transactionRevision": {
      +                        "type": [
      +                          "integer",
      +                          "null"
      +                        ]
      +                      },
      +                      "workspaceEpoch": {
      +                        "type": "integer"
      +                      },
      +                      "workspaceId": {
      +                        "format": "uuid",
      +                        "type": "string"
      +                      }
      +                    },
      +                    "required": [
      +                      "workspaceId",
      +                      "workspaceEpoch",
      +                      "snapshotId",
      +                      "transactionRevision"
      +                    ],
      +                    "type": "object"
      +                  },
      +                  "span": {
      +                    "description": "The resolved text span.",
      +                    "properties": {
      +                      "length": {
      +                        "description": "UTF-16 code-unit length.",
      +                        "maximum": 2147483647,
      +                        "minimum": 0,
      +                        "type": "integer"
      +                      },
      +                      "start": {
      +                        "description": "Zero-based UTF-16 offset.",
      +                        "maximum": 2147483647,
      +                        "minimum": 0,
      +                        "type": "integer"
      +                      }
      +                    },
      +                    "type": [
      +                      "object",
      +                      "null"
      +                    ]
      +                  }
      +                },
      +                "required": [
      +                  "snapshot"
      +                ],
      +                "type": [
      +                  "object",
      +                  "null"
      +                ]
      +              },
      +              "message": {
      +                "description": "The diagnostic message.",
      +                "type": "string"
      +              },
      +              "severity": {
      +                "description": "The diagnostic severity.",
      +                "enum": [
      +                  "Hidden",
      +                  "Info",
      +                  "Warning",
      +                  "Error"
      +                ],
      +                "type": "string"
      +              }
      +            },
      +            "required": [
      +              "id",
      +              "message"
      +            ],
      +            "type": "object"
      +          },
      +          "type": "array"
      +        },
      +        "error": {
      +          "description": "Structured error details when the invocation failed.",
      +          "properties": {
      +            "code": {
      +              "description": "Stable machine-readable error code.",
      +              "type": "string"
      +            },
      +            "correlationId": {
      +              "description": "Correlation identifier for matching the failure to server-side diagnostics, when available.",
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            },
      +            "message": {
      +              "description": "Human-readable explanation of the failure.",
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "code",
      +            "message"
      +          ],
      +          "type": "object"
      +        },
      +        "ok": {
      +          "const": false,
      +          "description": "Whether the tool invocation succeeded."
      +        },
      +        "warnings": {
      +          "description": "Non-fatal warnings the agent should consider.",
      +          "items": {
      +            "$ref": "#/$defs/warningInfo"
      +          },
      +          "type": "array"
      +        }
      +      },
      +      "required": [
      +        "ok",
      +        "error"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "properties": {
      +        "diagnostics": {
      +          "description": "Diagnostics that explain the failed invocation.",
      +          "properties": {
      +            "detailsAvailable": {
      +              "const": true
      +            },
      +            "detailsTool": {
      +              "const": "get-error-details"
      +            }
      +          },
      +          "required": [
      +            "detailsAvailable",
      +            "detailsTool"
      +          ],
      +          "type": "object"
      +        },
      +        "error": {
      +          "description": "Structured error details when the invocation failed.",
      +          "properties": {
      +            "code": {
      +              "const": "UnhandledException"
      +            },
      +            "correlationId": {
      +              "format": "uuid",
      +              "type": "string"
      +            },
      +            "message": {
      +              "const": "Tool execution failed."
      +            }
      +          },
      +          "required": [
      +            "code",
      +            "message",
      +            "correlationId"
      +          ],
      +          "type": "object"
      +        },
      +        "ok": {
      +          "const": false,
      +          "description": "Whether the tool invocation succeeded."
      +        },
      +        "reporting": {
      +          "description": "Error-reporting workflow available for an unhandled failure.",
      +          "properties": {
      +            "canPrepare": {
      +              "type": "boolean"
      +            },
      +            "prepareTool": {
      +              "type": [
      +                "string",
      +                "null"
      +              ]
      +            },
      +            "state": {
      +              "enum": [
      +                "Available",
      +                "AlwaysApproved",
      +                "DisabledByConfiguration",
      +                "ApprovalUnavailable"
      +              ],
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "state"
      +          ],
      +          "type": "object"
      +        }
      +      },
      +      "required": [
      +        "ok",
      +        "error",
      +        "diagnostics"
      +      ],
      +      "type": "object"
      +    }
      +  ],
      +  "type": "object"
      +}
  3. First observedv1.0.2

TDQS

A4.8/5.0
Behavior5/5

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

Annotations already declare readOnly/idempotent/non-destructive, so the description's added value is real behavioral detail beyond that: fallback to the first immediate child when the selected node has no operation, default 200 nodes and maxDepth 8 with root at depth zero, truncation flags to check in the result, null-root behavior when nodesLimit is zero, and the requirement to echo the current expectedSnapshot. These are non-obvious edge cases an agent would otherwise get wrong.

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

Conciseness4/5

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

Front-loads the capability statement, then alternatives, then edge-case behaviors, with no filler sentences. It is dense — five distinct behavioral claims packed into a short block — but nearly every clause carries actionable information, so it earns its length.

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

Completeness5/5

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

An output schema exists, so the description needn't explain return values and correctly does not. It instead covers what the schema cannot: node selection fallback, depth/limit counting conventions, truncation flags to check, and the snapshot-echo contract. For a nested 5-parameter tool with an output schema, this is complete.

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

Parameters4/5

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

Schema description coverage is 100%, so baseline is 3. The description earns above baseline by interpreting parameters: it explains that maxDepth counts the root at depth zero, that defaults are 200 total nodes and maxDepth 8, and that nodesLimit of zero returns a null root — semantics not present in the schema's terse field descriptions. It does not add anything for the location/selection or workspace parameters, which the schema covers.

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?

States a specific verb and resource ('Projects a semantic IOperation tree') and immediately enumerates what the projection contains (operation kinds, types, constant-value presence, source locations). This makes it clearly distinguishable from siblings like get-control-flow-graph, which are named explicitly.

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

Usage Guidelines5/5

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

Gives an explicit use case ('inspect the semantic structure at a source location') and then routes to alternatives by name and purpose: analyze-data-flow for variable flow sets, get-control-flow-graph for branches and successors. When-to-use and when-to-use-something-else are both stated.

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