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

Annotations already declare readOnlyHint=true, idempotentHint=true, non-destructive, and closed-world, so the safety profile is fully covered. The description adds nothing beyond them — no mention of not-found behavior, whether document content or just metadata is returned, or any scoping/permission constraints on agentId.

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, front-loaded with the verb and resource, with no filler. It is arguably under-specified rather than bloated, which is a completeness problem rather than a structure problem.

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, the description is the only place an agent could learn what comes back (full document text, metadata, versioning), and it says nothing. For a simple two-param read with rich annotations the bar is low, but the return-value gap is a real one.

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 are documented as 'The document ID' and 'The agent ID'. The description adds no additional meaning, such as whether docId is scoped to agentId or whether agentId is the owning agent — baseline 3 applies when the schema carries the semantics.

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 and resource ('Get a single knowledge base document'), which is unambiguous against the many kb siblings. It does not, however, explicitly name which sibling it contrasts with (list_kb_docs, get_kb_docs_bulk, search_kb_docs), so differentiation is inferred rather than stated.

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 guidance on when to use this versus list_kb_docs, search_kb_docs, or get_kb_docs_bulk. The agent must infer that this is the single-document fetch path from the word 'single' alone.

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