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blender_manage_constraints

Destructive

Manage constraints on objects or bones: add, configure, remove, enable, disable, or reorder. Use for rigging and motion control in Blender.

Instructions

Add, configure, remove, enable/disable, or reorder constraints on objects or bones.

Use this when: you need to set up rigging constraints or motion control.

Do NOT use for: reading constraints (use blender_get_object_data with include=['constraints'] or blender_get_armature_data with include=['constraints']).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesThe constraint operation.
target_typeNoWhether constraint is on an object or a bone.OBJECT
target_nameYesObject name, or 'ArmatureName/BoneName' for BONE.
constraint_nameNoConstraint name.
constraint_typeNoConstraint type for add. Common: COPY_LOCATION, COPY_ROTATION, TRACK_TO, DAMPED_TRACK, IK, STRETCH_TO, CHILD_OF. Full list in bpy.types.Constraint bl_idname.
settingsNoConstraint settings as key-value pairs.
Behavior3/5

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

Annotations already provide destructiveHint=true and readOnlyHint=false. The description adds no further behavioral context (e.g., side effects, errors, or specific destructive actions beyond the schema enum). It does not contradict annotations.

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

Conciseness5/5

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

The description is extremely concise: three sentences total, first sentence lists actions, next two provide usage boundaries. No wasted words, front-loaded with core purpose.

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?

Given the tool has a complex 'settings' object parameter and no output schema, the description could provide more guidance on common settings keys or what happens after operations. However, the use cases and exclusions are well-covered. Adequate but not fully complete.

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 coverage is 100% with detailed parameter descriptions. The tool description itself does not add additional semantic meaning beyond what's already in the schema, so baseline score of 3 is appropriate.

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?

The description clearly states the tool's function: 'Add, configure, remove, enable/disable, or reorder constraints on objects or bones.' It provides specific verbs and the resource, distinguishing it from sibling tools that read constraints.

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?

Explicit usage guidance is given: 'Use this when: you need to set up rigging constraints or motion control.' And 'Do NOT use for: reading constraints' with alternative tools (blender_get_object_data, blender_get_armature_data) named.

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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