Categorize Document

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

Annotations already declare idempotentHint=true and destructiveHint=false, so the safety profile is known. The description adds no additional behavioral context such as overwriting behavior, permission requirements, or side effects. It merely restates the action without going beyond the structured annotations.

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 a single sentence that is direct and front-loaded, containing no filler. It efficiently conveys the tool's purpose and the allowed values without excess verbiage.

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 simple two-parameter setter with annotations and an output schema, the description is largely adequate. It covers the core function, though it omits nuanced details like whether an existing category is overwritten. Given the low complexity, this is a minor 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 0%, so the description must compensate. It lists the category enum values (which is redundant with the schema) but does not explain the doc_id parameter or clarify the parameter semantics beyond what the schema names. Minimal additional meaning is provided.

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 clearly states the action 'Set a document's category' and lists all allowed categories, making it specific and distinguishable from sibling tools like vault_tag_doc (tags) and vault_set_priority (priority). It precisely identifies the resource and the operation.

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 implies usage for categorizing documents but provides no explicit guidance on when to use this tool versus alternatives (e.g., tagging or setting priority). It lacks exclusions or alternatives, so usage context is only implied by the category list.

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