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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuine behavioral context beyond that: default ordering, that results may be re-ranked by net P&L, and that screenshot images are attached to each record. Pagination behavior beyond the limit cap is not described.

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 sentences, both densely informative and front-loaded with the resource and ordering behavior; the sibling redirect is deliberately last. No filler sentences.

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 no output schema, the description usefully sketches the return shape (individual trades, newest/ranked, with images) and defers defaults to the fully documented schema. It stops short of noting result volume or pagination beyond the limit maximum, but nothing essential for a correct call is missing.

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 100%, so the baseline is 3. The description goes further by explaining that `symbol` filters an instrument family and that micros are treated as equivalent to minis ('micro ≡ mini'), which resolves an ambiguity the schema's 'instrument root' wording leaves open.

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 ('Individual trades for a period') plus ordering semantics ('newest first or ranked by net P&L') and returned payload ('each with its attached screenshots'). It also explicitly distinguishes itself from the sibling find_trades, so an agent can pick between them without opening either schema.

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?

Routes the agent to the alternative with a concrete condition: 'To find what was open on a specific calendar day use find_trades.' That is clear context for choosing a sibling, though no explicit when-not-to-use or prerequisite (e.g. account scoping) guidance is given.

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