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list_bone_constraints

Read-only

Lists all constraints on a specified pose bone to inspect rig setup, verify behavior, and debug animation limits.

Instructions

List constraints on a pose bone.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
boneYes
objectYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0+hardened.2

TDQS

C2.4/5.0
Behavior2/5

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

The readOnlyHint annotation already covers the read-only nature. The description adds no extra behavioral context, such as what the returned constraints look like or whether they include influence values. It essentially restates the tool's name.

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, focused sentence. It is concise and front-loaded, but it achieves this by omitting necessary detail.

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

Completeness1/5

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

For a tool with two required parameters and zero schema coverage, the description is severely incomplete. It lacks any indication of how to identify the bone or what 'pose bone' means, making it nearly impossible for an agent to call correctly.

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?

Schema description coverage is 0% and the description provides no explanation of the 'object' and 'bone' parameters. An agent would have to guess that 'object' refers to an armature and 'bone' to a bone name, which is not stated.

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 (list) and the resource (constraints on a pose bone). It distinguishes from the generic 'list_constraints' sibling by specifying 'pose bone', though it doesn't explicitly contrast them.

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 provided on when to use this tool versus alternatives like list_constraints. The description gives no context about the distinction between object-level and bone-level constraints.

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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