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

readOnlyHint=true already declares the safe-read profile, so the description doesn't need to re-establish that. It adds the StatusCake API mapping (GET /uptime) and confirms uptime percentages are computed, but says nothing about pagination defaults beyond what the schema documents or about cost of the uptime calculation. Some added context, but not rich.

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 front-loaded sentences with no filler — the returned-field list comes first, then the filter capability. The trailing 'StatusCake: GET /uptime' is the only borderline element, mildly redundant but cheap.

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 usefully enumerates the shape of each returned check, compensating for the missing return documentation. Pagination behavior (page/limit defaults) is left entirely to the schema, and there's no mention of result volume, but for a 6-param optional-filter list tool this is nearly complete.

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%, so the baseline is 3. The description's 'Filter by status or tags' mirrors the status/tags schema entries without adding syntax, defaults, or interaction rules (e.g. how matchany pairs with tags, or the nouptime tradeoff) beyond what the schema already states.

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 ('List uptime checks') and then enumerates the returned fields (status, type, URL, check rate, tags, uptime percentage), which cleanly separates it from get_uptime_check and the ssl/heartbeat/pagespeed list tools. An agent knows exactly what this tool produces without opening the schema.

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?

It notes the filtering capability ('Filter by status or tags') which implies the intended browsing/filtering use case, but never states when to prefer this over statuscake_get_uptime_check or the other list_* siblings, and gives no exclusions. Usage is inferable rather than stated.

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