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, fully covering the safety profile. The description adds nothing beyond that — no note on what happens for an unknown/inaccessible ID (error vs. empty), and no authorization context. With the bar lowered by annotations, this is still a near-zero contribution.

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 front-loaded sentence with no filler; the verb and key qualifier come first. It is appropriately sized for a trivial read, though it is too sparse to earn a 5.

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 one-parameter, single-record read tool with full schema coverage and annotations carrying the safety profile (no output schema to explain), the description supplies the essential operation and scope. Nothing critical is missing for correct invocation of such a simple tool.

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?

There is one parameter at 100% schema description coverage, and the schema already documents the UUID format and pattern. The description restates only 'by ID' and adds no format, scoping, or identifier-source guidance beyond the schema — baseline 3 for a single fully documented parameter.

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 ('Get') and resource ('project team member') with a scope qualifier ('single ... by ID') that implicitly distinguishes it from the sibling list_project_team_members. It does not explicitly name that sibling, but the singular/ID framing is enough for an agent to route correctly.

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: 'by ID' signals a lookup when the identifier is already known, in contrast to the list sibling. There is no explicit when-to-use or when-not-to-use statement, and no mention of prerequisites such as needing the member to belong to an accessible project.

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