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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description adds valuable context beyond them: the auth requirement (Authorization: Bearer <JWT>), the ordering guarantee (newest first), and the upstream data source. It omits pagination semantics despite having a 'before' param.

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?

Front-loaded with the purpose, then return shape, then caveats. Dense but each element carries information; the inline tuple notation is compact rather than wasteful, though slightly hard to parse.

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 describes the return structure and field meanings (token_in vs token_out), plus auth and ordering. It could note pagination via 'before' to be fully complete for a 4-param paged tool.

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%, so the schema already documents limit, since, before, and address. The description adds no parameter-specific syntax or format detail, so the baseline 3 applies.

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+resource: lists a wallet's recent swaps, ordered newest first. It goes beyond restating the name by naming the data source (Helius enhanced transactions). It does not explicitly distinguish itself from siblings like signet_portfolio or signet_paper_positions, so it falls short of a 5.

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 'the watch step of a copy-trade rig' implies usage context but gives no explicit when-to-use/when-not or named alternative. An agent can infer this is a polling/reading step, but must infer it.

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