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

With no annotations, the description bears full burden. It mentions return fields (firstSeenAt, ledgerVerified) and the 'since' parameter, but fails to disclose pagination behavior, ordering, limits, or data freshness. The 'limit' parameter is not explained, and the tool's mutation/destructive potential is unclear.

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 description is brief: two sentences covering purpose and the 'since' constraint plus return fields. It avoids fluff and is front-loaded. However, it could be slightly improved by succinctly noting optional filters without adding bloat.

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?

Given the tool has 4 parameters, no output schema, and no annotations, the description is notably incomplete. It omits key behavioral details like pagination, ordering, and filter semantics, leaving the agent with insufficient information for correct invocation.

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 add meaning. It explains 'since' (ISO8601 format) but ignores 'limit', 'category', and 'issuerCode'. The phrase 'across all programs' contradicts the existence of filter parameters, creating ambiguity. Overall, most parameters remain unexplained.

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 it returns 'recent appearance/change/close events across all programs' using a timestamp, which clearly indicates the tool's purpose. However, it does not differentiate from siblings like subsidy_watch_search or subsidy_watch_get; the mention of 'across all programs' implies a broad scope but lacks explicit distinction.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., subsidy_watch_get, subsidy_watch_search). The description only implies a broad query use case but offers no explicit when-to-use or when-not-to-use instructions.

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