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

The annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds only 'for this account' and does not disclose anything substantive about scoping, required identifiers, or how the 19 parameters affect behavior.

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?

The single sentence is concise and front-loaded, but it is drastically underspecified for a tool with 19 optional parameters. Brevity here reflects missing information rather than efficient communication.

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 complex Search Console metrics tool with 19 parameters and 0% schema coverage, the description is completely inadequate. Even though an output schema exists, the agent still needs to know which parameters are relevant and what the tool retrieves.

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 0% across 19 parameters, including url, days, date_from, date_to, action, status, page_id, site_url, and many unrelated-looking params like ad_account and ig_user_id. The description provides no parameter meaning at all, leaving the agent with no guidance on which inputs matter.

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 names the resource area, 'Search Console site metrics,' which is better than a tautology and loosely distinguishes it from GA4 and ads siblings. However, it does not specify what metrics are returned or what the tool actually does beyond fetching account-level Search Console data.

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 guidance on when to use this tool versus siblings such as search_get_top_queries, search_get_action_plan, or analytics_get_ga4_metrics. The phrase 'for this account' gives minimal context but no alternatives, exclusions, or prerequisites.

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