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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the safety profile is partly covered. The description adds real value by scoping the blast radius — documents and notes are untouched — but it says nothing about title uniqueness/collisions, error behavior, or what a rename returns, and it does not address the idempotentHint=false annotation.

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?

A single front-loaded sentence with zero waste: the mutation is stated first and the non-effect on contents follows immediately. Nothing redundant with the title or annotations.

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 three-parameter, single-field mutation with no output schema, the description covers what changes and what does not, which is the essential information. Only minor gaps remain, such as whether the new title must be unique and whether the same title can be re-applied.

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 67%: notebook_id and app_id are documented in the schema and the bare title parameter is self-evident, so the baseline sits near 3. The phrase 'Change a notebook's title' reinforces which field is being mutated and that app_id scoping does not alter notebook content, adding a bit beyond the schema text.

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: changing a notebook's title. An agent can distinguish it from rename_knowledge_document and update_knowledge_folder by the named resource, though the description never explicitly contrasts with those siblings.

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 by the purpose statement — there is no explicit when-to-use, no prerequisite (e.g. obtaining notebook_id via list_knowledge_notebooks, which only appears in the schema), and no statement of when a different tool such as move_knowledge_notebook or update_knowledge_note applies.

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