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

No annotations are present, so the description carries the transparency burden. It does disclose expected output facets (deadline risks, award-value changes, dataset status, next_request) and hints at continuation/cursor behavior. However, it does not explain the cursor protocol, end_snapshot_id semantics, ordering, or whether the 'maintained scope' has side effects.

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?

Two functional sentences with the action front-loaded and no filler. The second sentence is a compact list of output fields; it earns its place because there is no output schema.

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 7 parameters, no annotations, no output schema, and sibling tools, the description gives a useful overview but not enough to invoke confidently: cursor/end_cursor/end_snapshot_id semantics are unresolved, and the output JSON field list is not a substitute for structure or pagination rules.

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. It names scope, as_of, window_days, event_limit, and 'continuation cursor inputs,' but omits end_snapshot_id and end_cursor and does not explain cursor format or scope meaning beyond the schema's terse 'maintained collection scope.' Some compensation, but not complete.

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/resource combo: 'Find new or changed U.S. federal grants' for a 'maintained scope,' which is distinct from the sibling search/coverage/snapshot tools. It does not name or contrast those siblings, but the change-detection intent is clear.

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?

The phrase 'for a maintained scope' and the change-detection framing give clear context for when to call this tool, and the input list implies this is for polling/diff workflows. It stops short of explicit when-not-to-use guidance or naming grant_search/grant_snapshot as alternatives, so it is not a 5.

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