set_bone_parent

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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false. The description adds real value by enumerating the result fields (updated, not_found, saved, bone_count), which is important since no output schema exists. It does not mention that changes may need committing via commit_bone_changes, a minor gap.

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

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

Two lines, front-loaded with the action and its key variant, followed by the return contract. Nothing is wasted.

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

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

With annotations covering the safety profile and no output schema present, the description appropriately supplies the return shape. Adequate for invocation, though it omits whether the edit requires a subsequent commit/save step beyond the 'saved' flag.

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

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

Schema description coverage is 100%, so all three params are already documented. The description's note about empty parent_name duplicates the schema's own 'or empty/null to detach to root' text, adding no new detail, so the baseline 3 applies.

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

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

States a specific verb and resource ('Re-parent a bone') and immediately clarifies the edge case of detaching to root via an empty parent_name. An agent can distinguish this from rename_bone or set_bone_transform, though no sibling is named explicitly.

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

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

No explicit when-to-use or alternative-tool guidance. The parenthetical about passing an empty parent_name does convey a meaningful mode of operation (detach to root), which is implied usage rather than selection guidance.

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