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

The description adds the key reciprocal behavior: the caller accepts some offered fields while sharing some requested fields. Annotations already disclose that it is a non-read-only, idempotent, non-destructive operation, so the description does not need to repeat that. It still omits what happens to declined fields, what the token represents, and what state changes result from confirmation.

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 definition is a single front-loaded sentence with no filler or redundancy. Its brevity is efficient, though it leaves important operational details unstated rather than explaining them elsewhere.

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 four-parameter mutation tool with no output schema and no parameter descriptions, the description is too sparse. It omits prerequisite workflow details, token sourcing, conversation context, and the effect of confirmation on the participants' shared information.

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 0%, so the description must compensate for undocumented parameters. It gives useful conceptual meaning to 'accept' and 'share' as subsets of offered and requested fields, but says nothing about the required conversationToken or conversationId and does not clarify how the subsets should be chosen.

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 states the reciprocal action: accepting a subset of offered fields and sharing a subset of requested fields. However, it never names the resource as a contact exchange, defines 'offered' versus 'requested' fields, or distinguishes the action from siblings such as prepare_contact_exchange and get_contact_exchange. The purpose is only fully clear when combined with the tool name.

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 this tool should be used, when it should not, or how it relates to the sibling prepare_contact_exchange and get_contact_exchange tools. An agent must infer the workflow context and any prerequisite steps entirely from the name.

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