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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=false, so the write/safety profile is covered by structured data. The description adds one genuinely useful fact beyond that: the required write scope. It says nothing about duplicate-name behavior or what happens to existing work orders referencing categories.

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?

Two short sentences, zero filler, with the core operation front-loaded before the permission prerequisite. Every sentence earns its place.

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 three-parameter creation tool with no output schema, the description covers what the tool does and the auth requirement, which is enough for correct invocation. Given the enormous sibling set, one sentence of disambiguation would have made it fully complete.

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 each of the three parameters (name, module enum, description) is documented in the schema, including the 'Defaults to shared' behavior for module. The description adds nothing beyond the schema, so the baseline of 3 applies.

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 uses a specific verb and resource: 'Create a new work category.' An agent immediately knows the operation. It does not, however, distinguish this from the many sibling create_* category tools (create_cost_category, create_part_category, create_asset_type, etc.), leaving the agent to infer which category type applies.

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 states a prerequisite ('Requires work_categories:write scope') but gives no guidance on when to use this tool versus alternatives, nor when a new category is appropriate rather than reusing an existing one via list_work_categories.

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