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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is fully covered. The description adds no behavioral context of its own — no error behavior for a missing ID, no note on what a non-existent category returns — so it contributes nothing beyond the structured data.

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 the resource and lookup key first and zero filler. Nothing could be removed without losing information.

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 read-by-ID tool with full annotations, a fully described parameter schema and an output schema handling return values, the description is close to sufficient. The only shortfall is that it does not mention the fields/format options or disambiguate from the sibling list and item tools, but the agent has enough to call it correctly.

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%, so categoryId, the 'essential'/'all' fields enum and the json/markdown format enum are all documented in the schema itself. The description mentions none of them and adds no syntax or format meaning beyond what is already there, making 3 the correct baseline.

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 (retrieve) and resource (knowledge base category) plus the lookup key (by ID), which cleanly separates it from glpi_list_knowbase_categories and glpi_get_knowbase_item. It stops short of naming those siblings explicitly, so the differentiation must be inferred from the tool names.

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?

There is no when-to-use or when-not-to-use guidance. 'By ID' weakly implies the caller must already know the identifier, but nothing tells the agent to call the list tool first or how this differs from glpi_get_knowbase_item.

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