mastercam-mcp

by Praket7

Overview Schema Source Related Servers Discussions Admin

TypeScript

Local

compare_toolpaths

Read-onlyIdempotent

Identify differences between two CAM operations' toolpaths by supplying the before and after operation IDs.

Instructions

Compare two operations' toolpaths

Input Schema

TableJSON Schema

Name	Required	Description	Default
`afterOperationId`	Yes
`beforeOperationId`	Yes

Output Schema

TableJSON Schema

Name	Required	Description	Default
`ok`	Yes
`data`	No
`live`	No
`tool`	Yes
`error`	No
`receipt`	No
`documentRevision`	No
`operationFingerprint`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed14 schema fields changedv0.3.0Sep 24, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

addedInput schema / properties / afterOperationId

Added value: +{
+  "maximum": 2147483647,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / beforeOperationId

Added value: +{
+  "maximum": 2147483647,
+  "minimum": 1,
+  "type": "integer"
+}

removedInput schema / properties / confirmed

Removed value: -{
-  "type": "boolean"
-}

removedInput schema / properties / dryRun

Removed value: -{
-  "type": "boolean"
-}

removedInput schema / properties / feed

Removed value: -{
-  "type": "number"
-}

removedInput schema / properties / name

Removed value: -{
-  "type": "string"
-}

removedInput schema / properties / operationId
```
Removed value: -{}
```

removedInput schema / properties / operationIds

Removed value: -{
-  "items": {},
-  "type": "array"
-}

removedInput schema / properties / outputPath
```
Removed value: -{
-  "type": "string"
-}
```

removedInput schema / properties / speed

Removed value: -{
-  "type": "number"
-}

removedInput schema / properties / toolId
```
Removed value: -{}
```

addedInput schema / required

Added value: +[
+  "beforeOperationId",
+  "afterOperationId"
+]

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": false,
+  "properties": {
+    "data": {},
+    "documentRevision": {
+      "type": "string"
+    },
+    "error": {
+      "additionalProperties": false,
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "remediation": {
+          "type": "string"
+        },
+        "retryable": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "code",
+        "message"
+      ],
+      "type": "object"
+    },
+    "live": {
+      "type": "boolean"
+    },
+    "ok": {
+      "type": "boolean"
+    },
+    "operationFingerprint": {
+      "type": "string"
+    },
+    "receipt": {},
+    "tool": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "ok",
+    "tool"
+  ],
+  "type": "object"
+}

First observedv0.1.0Sep 8, 2026

TDQS

C2.7/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds no additional behavioral context beyond the verb 'compare', which aligns with the read-only hint, but does not disclose output format or side effects. No contradiction exists.

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?

The description is a single, front-loaded sentence with no wasted words. It is appropriately sized for the limited content, though it under-specifies important details, making it efficient but incomplete.

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

Completeness2/5

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

Although an output schema exists, the description does not indicate what the comparison yields or how to interpret results. Given the tool's specificity and the presence of many sibling comparison tools, more context about the comparison mechanism or when to use it would be expected. The description alone is insufficient for an agent to fully understand the tool's behavior.

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

Parameters1/5

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

The schema has 0% description coverage, and the description does not explain the two required parameters (beforeOperationId, afterOperationId). While the parameter names are somewhat self-explanatory, the description fails to clarify their semantic meaning or the order relationship, leaving the agent without sufficient guidance for correct invocation.

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 clearly states the action (compare) and the resource (two operations' toolpaths), and it is distinct from sibling tools like compare_tool_databases and compare_nc_files. However, it does not specify the nature of the comparison (e.g., visual diff, textual output), which would enhance clarity.

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?

No guidance is given on when to use this tool versus alternatives or any prerequisites. The description implies comparison of toolpaths but does not explain context, such as whether the operations must be generated first or how this differs from other comparison 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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