colab_url

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

With no annotations, the description carries the full burden. It usefully discloses one non-obvious trait ('does not open a browser'), clarifying this is a pure read that returns a URL rather than launching anything. However, it says nothing about auth/permission needs, session requirements, or error behavior when no session exists.

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?

One sentence, front-loaded with the action and resource, with the parenthetical caveat placed where it is most useful. No filler.

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?

An output schema exists, so return-value explanation is unnecessary. The main residual gap is the undocumented 'session' parameter, but for a simple URL-printing tool the description is otherwise adequate.

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?

The single 'session' parameter has 0% schema description coverage and is not mentioned in the description at all. The description therefore gives no guidance on what the parameter does or what the default (null) implies, failing to compensate for the coverage gap.

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 ('Print') and a precise resource ('the browser URL that attaches the Colab UI to this session'). It is clearly distinct from siblings like colab_status or colab_runtime_info, though it does not explicitly name what those alternatives return.

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: an agent can infer it should be called when the user needs a link to open the Colab UI in a browser. There is no explicit when-to-use statement, no mention of prerequisites (e.g. an active session), and no comparison to sibling tools.

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