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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered structurally. The description adds genuinely new behavior: the read is free of charge and the response covers pricing, actual deliverables and modification/input restrictions. It still doesn't say what happens for an unknown or over-length tool_id, or how pricing figures should be interpreted.

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?

The purpose is front-loaded, which is good, but the sentence packs many loosely grouped nouns ('成果角色', '修改与输入限制') that read as an enumeration rather than a clear statement. The two trailing clauses about the official site and quotes feel bolted on without clear relation to invocation.

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?

An output schema exists, so return-value explanation is not required, and annotations cover the safety profile. Missing pieces are the meaning/lookup path for tool_id and any sense of what an error or missing-capability response looks like — material for a lookup tool with a single opaque identifier.

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?

Only one parameter (tool_id) exists and schema description coverage is 0%, so the description must carry the meaning. It never explains that tool_id identifies the capability to fetch, nor where such an ID comes from (e.g., search_tools results). The trailing clause about quotes conforming to the schema is ambiguous rather than explanatory.

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 gives a specific verb and resource ('免费读取能力详情' — read capability details for free) and enumerates the fields returned (category, operations, outcome roles, input.schema, price, deliverables). It notably disambiguates the generic name 'get_tool' by framing it as a capability-detail read. It does not, however, differentiate itself from siblings like search_tools or get_service_overview.

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 hints at boundaries by saying the full official-site capabilities and MCP packages are viewed separately, which implies this tool is a subset read. But there is no explicit 'use this when X; use search_tools instead when Y' and no stated prerequisites beyond a tool_id. Usage is implied rather than directed.

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