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

Annotations already declare this is a write (readOnlyHint=false), non-destructive, and non-idempotent, so the description's burden is lighter. The description usefully adds that the write is scoped to a consent/preference toggle and clarifies two things it does NOT do (send messages, grant conversation access). It does not, however, explain the effect of enabled=true/false or why repeat calls are non-idempotent, so gaps remain.

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?

Three short sentences that are front-loaded with the core action, then the preference note, then the exclusions. No padding, though the ordering could arguably lead with the exclusions if those are the primary disambiguator.

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 moderate-complexity mutation tool with no output schema and 0% schema coverage, the description conveys the concept and safety scope adequately. It falls short on the parameter-level detail an agent would need to call it correctly (notably the boolean toggle and two agent IDs), leaving the definition only partially complete.

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 carry parameter meaning. It explains the '*' semantics for source_agent_id ('all sources') and frames the two agents as owned agents relaying reports, but never addresses receiving_agent_id or what enabled=true/false actually does. Only one of three parameters is meaningfully clarified.

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 a specific verb and resource: setting the owner's consent for one owned agent to relay reports from another. It also implicitly distinguishes itself from messaging tools by clarifying it 'does not send a message.' However, it does not name a sibling that it is an alternative to, so differentiation is only partial.

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 some context ('Uses the same preference as the agent screen') and two exclusions (does not send a message, does not grant access to customer conversations), which implies when NOT to reach for it. But there is no explicit when-to-use statement or named alternative, leaving the agent to infer the selection criteria.

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