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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds genuinely new context: results are paged per kind and the roles collection is large (hundreds), which warns the agent about needing pagination and partial results. It stops short of stating whether ordering is stable or what a page boundary means across kinds.

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 sentences with no waste; the resource and returned fields come first, followed by the operationally important paging/volume caveat. Nothing is buried 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?

All three parameters are optional and fully documented, and the description covers what is returned (slugs, canonical URLs) and the paging model, which matters since there is no output schema. A note on total counts or ordering would make it complete, but nothing essential for a correct call is missing.

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 description coverage is 100%, with the kind enum, per-kind limit, and per-kind offset all documented in the schema, so baseline is 3. The description reinforces the per-kind paging semantics but adds no syntax or behavioral detail beyond what the schema already provides.

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 specific verb (List) plus the exact resources (roles, tasks, sectors) and names the system (ToolGrail) and returned fields (slugs, canonical URLs). It is clearly a taxonomy-enumeration tool, distinguishable from siblings like search_tools or get_tool, though it never explicitly contrasts itself with them.

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 can infer this is the way to discover valid taxonomy slugs/URLs, but there is no explicit 'use this when...' or 'do not use for...' statement. The paging and volume note hints at operational context without saying when to prefer this over the sibling search tools.

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