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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral context: this is a prerequisite lookup step feeding createTaskTool, and the query param filters by name. It does not describe the shape of the returned member/role list, which is the remaining gap.

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?

Three sentences, front-loaded with what the tool returns, then the workflow reason, then the edge case. The docs link is placed last and costs nothing. No sentence is 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?

For a two-parameter read-only lookup with no output schema, the description covers purpose, routing and the follow-up call adequately. What is missing is any hint of the return payload (e.g. that each member/role comes back with an ID), which the agent needs to chain into createTaskTool.

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%, so both parameters (projectId, query) are already documented in the schema and the description need not repeat them. Its mention of 'pass their IDs as tafkidims' refers to createTaskTool's parameters rather than this tool's, so it adds no additional semantics for the two inputs here.

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+resource ('List the people (members) and roles (tafkidim) of a project') and immediately scopes it to a distinct concern that no sibling covers. It also introduces the domain term 'tafkidim', which removes ambiguity about what 'roles' means in this system.

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 names the trigger ('resolve a task assignee ... before calling createTaskTool') and the alternative branch ('for a task with no specific person, pick the roles that fit it here and pass their IDs as tafkidims'). This is a when-to-use plus a when-to-use-differently, which is the strongest form of routing guidance.

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