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

Annotations already establish that this is a non-readonly, non-destructive, non-idempotent, closed-world mutation. The description adds only the scope of updating one category in an event and does not explain partial-vs-full update behavior, required existence of the category, permission needs, or effects on unspecified fields.

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 front-loaded sentence with no wasted wording. However, it is arguably too terse for a three-parameter mutation tool, so it loses some structure value despite being concise.

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?

The tool has an output schema and annotations, but the input schema has low description coverage and the description does not fill the gaps. For an update tool with three required parameters, the definition is too sparse to fully guide correct invocation.

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?

With only 33% schema description coverage, the description should compensate for undocumented parameters but does not. It does not clarify the meaning of category_id or title, nor does it explain that title is the new category name and category_id selects the target within event_id.

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 ("Update one exhibitor category") and adds the scoping detail that the category belongs to the supplied event. It is clear what operation is performed, though it does not explicitly distinguish this from siblings like create_exhibitor_category, delete_exhibitor_category, or update_exhibitor.

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 use when modifying an existing exhibitor category, but gives no explicit when-to-use guidance, prerequisites, or alternatives. It does not say when to choose this over create/delete/update sibling tools.

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