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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds only the intended downstream use case and says nothing extra about result size, paging behavior, or what an empty list means, so it clears the lower bar set by annotations but does not exceed it.

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?

A single well-formed sentence that front-loads the action and resource, with the example use case following it. No redundant restatement of the title or of schema details; it could be marginally tighter but every clause carries meaning.

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 zero-required-parameter, read-only list tool with fully documented schema and strong annotations, the description covers the essentials. It leaves the agent to infer how to page through large result sets and whether the response includes total counts, which is a minor but real gap given no output schema exists.

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 all seven parameters documented, including defaults, enum values, and the pageSize maximum of 20. The description adds no filtering or sorting semantics beyond the schema, so the baseline of 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 (list) and resource (the organization's employees), so an agent can immediately tell it apart from the sibling list_* tools, which each name a different resource. No explicit statement of what it does not cover, but the resource 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?

Provides one concrete usage scenario — resolving a value for assignedToId on an invoice or estimate — which implies when to reach for this tool. It gives no guidance on when not to use it, no mention of pagination/search strategy for large orgs, and no pointer to related lookups such as list_projects or fetch_customer.

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