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

Adds genuinely useful behavior beyond the annotations: the side effect of stopping escalation and the concrete failure mode that re-acknowledging returns HTTP 409. The 'Idempotent-ish' hedge is consistent with idempotentHint=true in state terms (409 errors but nothing else changes), so this is a nuance disclosure rather than a contradiction. It omits auth/permission requirements and what the response body contains.

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?

Front-loaded with the action and its effect, then the edge case, in three dense sentences with no filler. The trailing raw endpoint (POST /api/v3/.../acknowledge) is the least valuable line for an agent invoking an MCP tool, though it does confirm the underlying semantics.

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 two-parameter mutation with no output schema, the description covers purpose, effect, and the one realistic error path, which is close to sufficient. Missing pieces are minor: no statement about what a success response returns and no mention of permission/scope requirements for acknowledged_by.

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 both parameters are documented inline, including that incident_id comes from betterstack_list_incidents and that acknowledged_by accepts an e-mail or custom identifier. The description adds nothing about the parameters, so the 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 (acknowledge) and resource (an ongoing incident) plus the operational effect — signalling someone is looking into it and stopping further escalation. It does not name the nearby sibling betterstack_resolve_incident, so the acknowledge-vs-resolve distinction is left implicit rather than 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?

The description implies when to use it ('signalling that someone is looking into it') and hints at the alternative action by scoping to an 'ongoing' incident. But it never says explicitly when to prefer this over betterstack_resolve_incident, nor does it state prerequisites such as needing a valid, unacknowledged incident.

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