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

Annotations already establish the safety profile (readOnlyHint=true, idempotentHint=true, destructiveHint=false), so the bar is lower. The description adds that omitting 'type' returns every source, a useful default-behavior disclosure, but says nothing about response shape, pagination, or whether results are links versus entities.

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?

Purpose is front-loaded in the first sentence and the rest is a dense list of colloquial triggers that aid semantic matching rather than filler. The heavy quotation run-on is functional, though it could be tightened with lighter punctuation.

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 two-optional-parameter read tool with no output schema, the description covers what the tool yields (official places to look) and the default behavior. Minor gap is the absence of any statement about the returned structure, which the missing output schema would otherwise have covered.

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 coverage is 100% and both descriptions already enumerate the type values and the country default, so the schema carries the load (baseline 3). The quoted example queries reinforce how everyday phrasing maps to a type value, but add no syntax or constraint beyond what the schema states.

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 names a concrete verb+resource (find official places to look, returned by type) and grounds it immediately in real user questions, so an agent knows this is a lookup/source-discovery tool. It is only weakly differentiated from the sibling get_state_search (federal/national vs state), which is left implicit.

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 explicit when-to-use triggers via example queries ('find an old 401k', 'unclaimed tax refund', 'find my old pension' with country=GB) and states the no-argument fallback ('Without a type, returns every source'). It does not name get_state_search as the alternative for state-level searches, so the exclusion boundary is missing.

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