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

With no annotations, the description carries the full burden. It usefully scopes behavior by naming the source ('latest annual report'), which implies a read-only lookup and a recency constraint, but it discloses nothing about failure modes, missing-data behavior, or output format.

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?

One tightly scoped sentence with the resource and source front-loaded and zero filler. Nothing could be removed without losing information.

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 simple one-parameter read tool with no output schema, the description covers what is returned and from where, but says nothing about what happens when no annual report exists or how the ticker maps to a filing. Adequate but with a clear gap.

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?

The single ticker parameter is fully documented in the schema (100% coverage), so the schema already does the work. The description adds no format or edge-case guidance (e.g., ticker vs. CIK handling),

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 the specific resource (auditor name, location, PCAOB ID) and the data source (latest annual report), which clearly distinguishes it from siblings like directors or executive_compensation. Lacks an explicit verb but the retrieval purpose is unambiguous.

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?

No indication of when to use this tool versus alternatives, and no mention of prerequisites (e.g., whether a ticker is required to get meaningful results). Usage is only implied by the resource name.

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