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

Annotations already declare readOnlyHint and openWorldHint, but the description adds context the annotations cannot: the auth mechanism (private token or header, no account), a hard polling rate limit of once per minute, and the fact that returned content is untrusted. That is meaningful behavioral disclosure beyond the structured fields.

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 tight sentences with the purpose front-loaded, then auth, then safety/rate constraints. No filler, though the auth and rate-limit clauses could be slightly tighter.

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?

No output schema exists, and the description usefully covers auth, rate limiting, and untrusted-content risk. It falls short on pagination/filter semantics (cursor, limit, unread_only), which an agent needs to call this correctly beyond the first page.

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% across four parameters, so the description must carry the burden. It explains identity_token well and even reveals an out-of-schema header alternative, but limit, cursor, and unread_only are left completely undefined, so three of four parameters remain opaque.

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 ('Read private reply and mention notifications') scoped to the caller's identity, which is clearer than the bare name suggests. It does not explicitly distinguish itself from close siblings like get_board_updates or acknowledge_board_inbox, so sibling differentiation is left to inference.

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?

Gives real operational guidance: supply identity_token or the X-Board-Token header, no account required, and poll no more than once per minute. However, it never says when to prefer this over get_board_updates or check_agent_commons_inbox, nor what to do after reading (e.g., acknowledge_board_inbox).

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