Sign in to Axcel

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

Beyond the annotations (which only declare it is not read-only, is open-world and non-idempotent), the description discloses key behavior: it launches a UI window on the user's machine, returns immediately rather than blocking, and requires a human round-trip before completion. That is real added context for an interactive auth flow. It still omits failure/edge behavior (e.g., an existing window, timeouts).

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?

Three short sentences, front-loaded with the action and side effect, then the required follow-up sequence. No filler and nothing redundant with the schema.

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?

No output schema exists, and the description compensates by stating the return behavior (returns immediately) and the mandatory next call, which is what an agent needs for this two-step flow. It is slightly thin on what the user sees or how to detect a failed/abandoned window.

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?

Only one optional parameter (restart) and schema description coverage is 100%, so the schema already explains it. The description adds nothing about restart semantics, which matches the baseline-3 rule when structured fields do the work.

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?

Specific verb (open a browser window), specific resource (axcel.cloud sign-in), and it explicitly names the follow-up sibling axcel_login_complete. An agent can distinguish this from axcel_logout, axcel_login_import_cookie_file and axcel_login_diagnose from the text alone.

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 states the condition for use (user signs in with their own Google account) and prescribes the exact follow-up workflow: tell the user to sign in, wait, then call axcel_login_complete. It does not say when to prefer the cookie-file import or diagnose siblings, so it stops short of full alternative routing.

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