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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavioral context by disclosing the access-scoping rule and its error outcome: a not-found result when the key owner was not a participant.

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 action and key front-loaded and the access caveat placed last where it matters.

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 read-only, idempotent single-item fetch with full annotation coverage, the description supplies the action, the key, and the notable failure mode. It stops short of hinting at what a 'recap' contains, but with no output schema and a trivially simple contract that gap is minor.

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?

With one parameter at 100% schema coverage, the schema already documents sessionId and its provenance. The description only restates 'by session ID', adding no format, casing, or length detail beyond the structured field.

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 one personalized Referna meeting recap') plus the lookup key ('by session ID'). The singular 'one' paired with the sibling list_meeting_recaps makes the single-vs-list scope distinction clear without opening either schema.

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?

Usage is implied rather than stated: the sessionId schema note ('returned by list_meeting_recaps') signals the intended list-then-fetch flow, but the description itself gives no explicit when-to-use, prerequisites, or when-not guidance.

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