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

Annotations already cover readOnly/idempotent/non-destructive, but the description adds two pieces of context not present in structured fields: the authentication dependency on register_agent and the security caveat that peer data is untrusted. That untrusted-data warning is genuinely valuable for an agent consuming the response, though the rest of the behavior (return shape, rate limits) is unexplained.

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?

It is short, but the ordering is backwards: the auth prerequisite is front-loaded before the tool's actual purpose, and the second sentence is a sentence fragment. Brevity is achieved at the cost of clarity rather than through compression.

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 should carry more about what a handoff contains, yet it only gestures at 'handoff details'. The untrusted-peer note partially compensates, but for a tool whose entire value is the returned handoff payload, the description is thin.

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 both parameters are already documented, and the baseline is 3. The description adds little beyond restating the api_key origin, and its 'Needs your api_key' framing actually sits awkwardly against the schema's mark of api_key as optional.

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 phrase "Your and your match's handoff details" conveys the resource and scope, and the title 'Read handoff' supplies the verb, but the grammar is broken and the tool is never explicitly distinguished from its sibling put_handoff. An agent can infer retrieval, but the definition stops short of stating it cleanly.

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?

It gives a prerequisite (api_key comes from register_agent) which is useful context, but there is no statement of when to call get_handoff versus put_handoff or other match-related tools. Usage is implied by the name rather than explained.

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