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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds useful context about the return format ('as markdown') and the scope of topics, but it does not disclose error behavior, host handling, or content size expectations. This is reasonable value beyond annotations but not rich.

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 that communicates the action, output format, and topic coverage without wasted words. It is appropriately sized for the tool's simplicity.

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-only documentation fetcher with good annotations and complete schema coverage, the description supplies the needed output format and topic list. It is slightly light on failure/edge-case behavior, but overall it is complete enough for the tool's low complexity.

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%: both 'host' and 'topic' are described in the input schema, including the full enum. The description adds no parameter-specific meaning beyond the schema, so the baseline score 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 clearly states the tool returns 'one documentation topic as markdown' and enumerates the available doc areas, making the resource and action specific. It does not explicitly contrast itself with sibling tools like get_integration_brief or get_widget_snippets, which keeps it from a 5.

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 this is the tool to use when you need a single known documentation topic, but it does not explicitly say when to use it instead of list_docs, search_docs, or get_widget_snippets. The 'topic from list_docs' hint exists in the schema, but the description itself provides no workflow or exclusion guidance.

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