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

With no annotations, the description carries the full behavioral burden and delivers almost nothing: no statement that it is read-only, no pagination or result-count behavior, no return shape, no ordering. 'List' weakly implies a safe read, but nothing is confirmed.

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 or redundancy. It is efficient, though efficiency here shades into under-specification rather than deliberate brevity.

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 tool with no annotations and no output schema, one sentence is far too thin — the agent learns nothing about what a 'project' record contains, whether results are paginated, or how the publisher-key scope affects results. Key decision inputs are 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% and there is only one optional parameter, so the baseline is 3 under the rubric. The description adds nothing about notification_message, which is an unusual parameter for a read operation and whose purpose (a follow-up failure message) is only explained in the schema.

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 ('Audience Resolver projects') plus an access scope ('with the publisher key'), so the agent knows exactly what it retrieves. It does not, however, distinguish itself from siblings like list_project_assets or list_project_drive, which sit in the same naming family.

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?

There is no statement of when to use this versus the many other list_* tools, no mention of preconditions, and no exclusions. The publisher-key phrase is an access constraint, not usage guidance.

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