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 without the description. The description adds only one fact beyond the title: that the response includes the current revision alongside the document, which hints at return shape. It says nothing about permissions, error behavior for unknown IDs, or what happens when a document has no current revision.

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 short sentence with no filler and the key scope word ('one') front-loaded. It is punished only indirectly for being identical to the title rather than for verbosity.

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?

With no output schema and full schema coverage on inputs, the description should explain the return shape (document body plus revision metadata) and error cases, but only gestures at the revision. For a simple two-parameter read this is minimally adequate but leaves gaps an agent must discover at call time.

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 both parameters (company UUID, document ID with a slug pattern) are documented in the schema itself. The description adds no meaning about the parameters, which is acceptable at baseline 3 given full schema coverage.

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 gives a clear verb ('Read') and resource ('one company knowledge document and its current revision'), but it is a verbatim restatement of the tool title, so it adds no differentiation on its own. It never contrasts itself with the nearby siblings summer_knowledge_list, summer_knowledge_history, or summer_knowledge_edit, leaving an agent to infer that this is the single-document fetch.

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 statement of when to use this tool versus alternatives such as summer_knowledge_list or summer_knowledge_history, both of which could plausibly retrieve document content. No prerequisites, no mention of what to do if the document does not exist.

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