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

Annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=false, so 'Read-only' merely repeats structured data. The description adds modest value by clarifying that licenses are credentials rather than track record and by scoping the data to warranty/A/S hours and document links, but it omits return format or any other behavioral detail.

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 definition is a single dense sentence followed by a short read-only tag. It front-loads the resource and enumerates contents efficiently, though the list-like phrasing is slightly harder to scan than structured bullets.

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 parameters, no output schema, and clear read-only/idempotent annotations, the description is largely complete: it enumerates the company facts returned and sets a scope boundary for licenses. A richer return-value description is unnecessary here, though a brief note on document link format would help slightly.

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?

This tool takes zero parameters, so the baseline is 4. The description correctly does not waste space explaining inputs and instead focuses on what information the tool surfaces.

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 specific resource (WOOKANG TECH company facts) and enumerates the exact content returned: phone, address, hours, registration number, service area, licenses, warranty/A/S hours, and document links. It is clearly distinct from siblings like get_price_range and search_faq, though it lacks an explicit verb.

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 content list implies this tool is for factual company information, but it never states when to use it instead of get_price_range, search_faq, or submit_inquiry. The parenthetical 'credentials, not track record' is a useful scope qualifier but not a routing guideline.

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