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

With readOnlyHint=true already covering safety, the description adds real behavioral context: results are ordered newest first, pagination works via links.next or the before parameter, and each run carries location, status code, and response time in ms. It also discloses the underlying REST endpoint (GET /uptime/{test_id}/history), which helps an agent understand the data shape.

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: the first establishes what a row contains and the sort order, the second covers pagination and cites the backing endpoint. Nothing is redundant or buried.

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?

There is no output schema, and the description compensates by enumerating the returned fields (when, location, status code, response time). Combined with the paging explanation, an agent has enough to call and interpret the result, though error or empty-history behavior is unaddressed.

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 after/before/limit/test_id are already documented. The description reinforces the before/links.next paging relationship but adds no syntax or format detail beyond what the schema states; baseline 3 applies.

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 ('Individual test runs for one uptime check') plus the exact fields returned (location, status code, response time). This implicitly separates it from aggregate siblings like statuscake_get_uptime_periods, but it never names an alternative to make the distinction explicit.

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 through the paging instruction ('follow links.next (or pass before) to page back'). There is no guidance on when to reach for this tool versus statuscake_get_uptime_check or statuscake_get_uptime_periods, nor any stated preconditions.

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