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

With no annotations, the description carries the full burden, and it delivers useful behavioral context: server-side sorting, newest-first default, AND-combined tags, and concept-slug semantics. It does not mention response format or pagination behavior, but for a read-only browsing tool the disclosed behavior is largely sufficient.

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?

Two dense, purposeful sentences with no filler. The core behavior and filtering scope are front-loaded, and the alternative-tool guidance is placed at the end without diluting the message.

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?

Despite 11 params and no output schema, the descripion gives enough orientation for a browse tool: key filter categories, one composite filter example, and a route to the sibling search tool. It doesn't explain pagination or result shape, but schema defaults and the nature of a list operation make that gap minor.

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 high at 82%, so the baseline is 3. The description mostly restates what the schema already documents, though it adds useful framing such as 'AND-combined' for tags and 'implementations of one concept' for concept slugs. It does not add meaning for direction or page_size, but those are adequately covered by schema metadata.

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 clear verb ('Browse') and a specific resource ('indicator catalog') with the available filtering dimensions. The description also distinguishes this tool from library_search by positioning it as structured browsing, making its role 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?

Explicitly tells the agent when to use this tool: structured browsing with concrete query examples ('latest indicators', 'everything in the volatility family'). It also names the alternative for keyword discovery—library_search—so the agent can route between siblings confidently.

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