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

No annotations are provided, so the description carries the behavioral burden alone. It does disclose the read nature ('取') and enumerates the returned fields, which is valuable given there is no output schema, but it says nothing about permissions, rate limits, or behavior for an unknown/invalid deal_id.

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?

A single tight sentence with the key action and the returned payload front-loaded; nothing is padded or redundant.

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 one-parameter read tool with full schema coverage and no output schema, the description partially compensates by naming the returned fields. It is nearly sufficient, missing only id provenance and error behavior.

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?

With a single parameter and 100% schema description coverage, the schema already documents that deal_id is 'search_deals 返回的 id'. The description adds no syntax, format, or type nuance beyond that, so the baseline of 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?

The description states a specific verb (取/fetch) and resource (交易/deal) plus the shape of the returned record (amount structure, license type, counterparty company ids). It is clearly distinct from the search_* siblings by the word 'detail' and '完整记录', though it never names search_deals as the id source inside the description itself.

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?

Usage is only implied: an agent infers it is called with a deal_id obtained elsewhere (the id provenance is mentioned only in the schema). There is no explicit when-to-use, when-not, or named alternative such as search_deals vs. this tool.

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