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

Annotations already flag this as a destructive, idempotent, non-open-world write, so the description's job is to add context. It does: it scopes the mutation to the title field only and explains request_key retry semantics ('Reuse request_key only for the same exact request'), which clarifies what idempotentHint means in practice. It does not describe permission requirements, revision-conflict behavior, or what happens to existing links on rename.

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?

Three short sentences, front-loaded with the operation and its scope. Each sentence carries distinct information, though the workspace_id sentence is terse enough to be slightly ambiguous about which directory applies to a given document.

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?

For a six-parameter destructive mutation with an output schema, the description covers the essential safety-relevant facts: it is title-only, and the idempotency key must not be reused across different requests. Missing pieces like season_id meaning and revision-conflict handling are gaps, but expected_revision is already well documented in the schema.

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 coverage is only 33%, with descriptions on title and expected_revision only. The description compensates for part of that gap by specifying the source of workspace_id and the correct reuse rule for request_key, but document_id and season_id remain undocumented in both schema and description.

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 ('Rename the document') and bounds scope with 'without changing its body', which distinguishes it from body-editing siblings such as replace_studio_document_body. It never names the near-duplicate sibling update_document_title, so an agent cannot tell the two apart from the description alone.

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?

Usage is only implied: the tool is for title-only changes, and the workspace_id must come from an authorized Film, Series or GenAds directory. There is no explicit when-to-use/when-not guidance and no routing to update_document_title, apply_studio_document_edits, or find_and_replace_in_document.

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