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Get Operation Tree

get-operation-tree

Read-onlyIdempotent

Return a bounded IOperation tree for a selected C# location, with metadata and exact source pointers to support semantic analysis.

Instructions

Returns a bounded IOperation tree with metadata and exact source pointers.

Input Schema

TableJSON Schema

Name	Required	Description
`location`	Yes	The selected location.
`maxDepth`	No	The maximum traversal depth.
`workspace`	No	Provide workspaceId, alias, path, or any combination.
`nodesLimit`	No	The optional maximum total number of projected operation nodes.
`expectedSnapshot`	No	Echo the snapshot returned with the data or transaction state used to construct this request.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv1.0.4Oct 15, 2026

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"
+}

First observedv1.0.2Oct 15, 2026

TDQS

B3.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds useful detail beyond the annotations by noting the tree is 'bounded' (reflecting maxDepth/nodesLimit) and returns 'exact source pointers', but it does not describe truncation behavior or what happens when limits are hit.

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?

A single front-loaded sentence with no filler; every word carries weight. It is arguably under-specified rather than verbose, but it is appropriately sized and wastes nothing.

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?

With an output schema present, return values need not be explained, and the annotations cover safety. However, for a 5-parameter tool with deeply nested location variants (span vs selection) and workspace disambiguation, the description gives no guidance on choosing inputs or the tool's place among siblings, leaving meaningful gaps.

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 the schema already documents location, maxDepth, nodesLimit, workspace, and expectedSnapshot in detail. The word 'bounded' loosely gestures at the depth/node limits but adds no syntax or meaning beyond what the schema provides, so the baseline of 3 applies.

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

Purpose4/5

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

The description states a clear verb and resource: it 'Returns a bounded IOperation tree with metadata and exact source pointers.' This tells the agent exactly what is produced, but it offers no differentiation from analysis siblings like get-control-flow-graph, get-code-context, or get-dependency-graph, which an agent could easily confuse with an operation tree.

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

Usage Guidelines2/5

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

There is no when-to-use guidance, no prerequisites, and no mention of alternatives among the ~48 sibling tools. The agent must infer that this is for inspecting Roslyn IOperation nodes from the name alone, with nothing routing it away from overlapping graph/context tools.

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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