Project summary

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds that this is an aggregate single-call summary (counts, mode, traffic), which is meaningful context, but it says nothing about permissions, cost, or freshness/staleness of the traffic data.

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 the payload described up front and the usage rule second. No padding or restated information.

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?

With no output schema, the description carries the burden of describing returns and does so by naming the four categories of data returned. Combined with annotations covering the read-only nature, an agent has enough to call it correctly, though it lacks detail on the shape of the traffic metric.

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 parameter, so the schema already documents projectId fully. The description adds no format or constraint detail beyond it, which is the correct baseline for a fully-documented single 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 and resource (get a summary for one project) and enumerates the exact contents returned: content counts, key count, database mode, recent traffic. It implicitly distinguishes from the list_* siblings by saying it replaces 'listing everything', but it does not explicitly differentiate from the close sibling get_project, so it falls just short of a 5.

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 a clear when-to-use condition ('to answer "what is in here"') and names the alternative it replaces ('listing everything'). It does not state exclusions (e.g., when to prefer get_project or get_content_analytics instead), so it stops at 4.

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