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

Annotations already cover the safety profile (readOnly, non-destructive, closed-world), and the description adds value beyond them by disclosing that Google Search Console connection status and property are included, and only conditionally — "when this Connected App may read Search Console data." That conditional field presence is genuinely useful behavioral context an agent cannot get from annotations.

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 sentences, front-loaded with the core action and scope, then the downstream-usage note. The conditional clause about Search Console permissions is slightly dense but earns its place by explaining why that data may be absent.

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 parameterless listing tool with full annotations and an output schema, the description covers what the tool does, what extra data it may carry, and how the result is consumed. Only minor gaps remain, such as ordering or behavior on an empty workspace.

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 are zero input parameters, so the baseline is 4. The description also helpfully notes that the returned projectId is the identifier to pass to other Keytomic tools, tying the output to downstream parameter usage.

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?

The description gives a specific verb and resource ("Lists the websites (projects) in the connected Keytomic workspace") and clarifies the sites/projects naming ambiguity. It does not explicitly distinguish itself from the sibling get_project, which returns a single project, so it stops short of full sibling differentiation.

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: it is clearly a discovery/enumeration call, and "Use the projectId with other Keytomic tools" indicates the output feeds downstream calls. There is no explicit statement of when to use this versus get_project or the other list_* tools.

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