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

The description discloses important side effects beyond the readOnlyHint=false annotation: the version remains stored, it may later be deleted under normal retention, and unnamed versions return removed:false. It also explains specific refusal conditions, error codes, and remediation paths, which is strong transparency for a mutation tool.

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?

The description is dense but front-loads the core effect and then organizes refusal conditions clearly. It is longer than a minimal definition, but the error-specific guidance is useful; the trailing 'Free.' is terse and slightly awkward but does not undermine the structure.

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 no output schema, the description does well by explaining the removed:false case and documenting key error codes and recovery steps. It does not fully describe the success response shape when a name is actually removed, which is a minor remaining gap.

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%, and the schema already explains both project_id and version, including that version should come from studio.list_versions. The description adds scope and validity context through error behavior, but does not provide additional parameter syntax or formatting beyond what the schema already states, so the baseline of 3 is appropriate.

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?

The description states a specific verb and resource: removing the name from a studio project's named version. It also distinguishes the action from deletion by explicitly saying the version stays stored, so an agent can understand the operation without opening the schema.

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?

The description gives clear context for when this operation applies: freeing one of the 20 names while preserving the stored version. It also names recovery alternatives for refusal cases, including studio_project_list and studio.list_versions, though it does not explicitly compare against adjacent tools like studio.snapshot_version or studio.restore_version.

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