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

Annotations already declare readOnlyHint=true, so the safe-read profile is covered. The description adds genuinely useful behavior beyond that: the result ordering (sorted by creation time) and the underlying Management API endpoint (GET /v1/agents), which helps the agent reason about pagination ordering.

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 tight sentences with zero filler; the core purpose leads and the API path is trailing supporting detail. Every clause earns its place.

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, zero-required-parameter list tool with a fully documented schema and no output schema, the description covers what it does, the ordering, and the endpoint. It could note pagination traversal (using page/page_size to iterate) but nothing critical for correct invocation 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% – page and page_size are both documented with defaults and bounds in the schema itself. The description adds nothing about paging semantics, so the baseline 3 applies.

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 and resource ('List agent entities in your account') and adds the ordering ('sorted by creation time'). The verb 'List' cleanly separates it from the sibling mistral_get_agent, but the description never names that sibling or otherwise explicitly differentiates itself within the list/get pairs.

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 listing verb plus 'in your account' implies when to reach for this tool, but there is no explicit guidance on when to use it versus mistral_get_agent for a single agent, nor any prerequisites or exclusions.

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