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

readOnlyHint=true already tells the agent this is a safe read. The description adds the concrete endpoint and the fact that results carry build+deployment status, but says nothing about pagination behavior beyond what the schema documents. Adds some value over annotations, hence a 3.

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 tightly packed sentences: one states what is listed and returned, the second gives the endpoint. Nothing is wasted and the essential scoping is front-loaded.

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 read-only list tool with full schema coverage and annotations declaring safety, the description is nearly complete; it even notes the returned status fields. Lacking only an explicit alternative/comparison note to feel fully 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 coverage is 100%, so all four parameters (page, cursor, per_page, projectId) are already described in the schema. The description adds no parameter-level syntax or format detail. Baseline 3 is correct when the schema carries the full burden.

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 (List) and resource (services), scopes it to a project, names the service kinds (build/deployment/combined), and describes the returned payload (build+deployment status). This cleanly distinguishes it from the singular northflank_get_service sibling.

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 implied by the name and scope but the description never says when to prefer this over northflank_get_service or northflank_list_service_builds, nor any prerequisites. Adequate but no explicit routing guidance.

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