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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered; the description reinforces it with the explicit 'opens nothing by itself' clause, which resolves the apparent tension with the 'update' name. It also discloses the return shape (step-by-step screens, buttons, fields) and the downstream dependency on the Cloud Browser. It does not mention failure modes, e.g. what happens if the Simpro account or browser is unavailable.

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 first two sentences are front-loaded and efficient, covering what happens and what to do next. The third sentence about Simpro's REST API, OAuth 2.0 and the absence of an official MCP server is marketing/context filler that does not help an agent select or invoke this tool, and it dilutes an otherwise tight definition.

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 no parameters, so the description carries the burden, and it does describe the returned guidance at a high level. What remains missing is how the tool resolves the job and desired status without parameters, and whether the returned instructions are guaranteed actionable (e.g. version/UI-dependent). Adequate but with a real gap for a tool whose whole value is the returned content.

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?

With zero parameters the baseline would be 4, but the absence of any job identifier or target status parameter is itself a semantic question the description should answer, and it does not — the reader must assume the job and status are inferred from conversation context. Nothing explains how those inputs are conveyed, which is the key ambiguity for an agent deciding whether it can call this at all.

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 a specific verb and resource (update job status in the user's Simpro account) and immediately clarifies the actual output: step-by-step screens, buttons and fields rather than a state change. That distinguishes it well from the cotlet_browser_* execution tools. It stops short of 5 because it never states which job or target status it operates on, leaving the scope of 'update' ambiguous at the point of selection.

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 gives a clear hand-off rule: call this first, then perform the action with cotlet_browser_* in the Simpro Cloud Browser. That is genuine sequencing guidance. However, it offers no when-not guidance (e.g. use simpro_list_jobs first to find the job, or skip this when the user already knows the steps) and no prerequisites about the browser session being open.

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