get_current_url

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

No annotations are provided, but 'Get' clearly signals a read-only operation with no side effects. The description does not detail return formatting, but an output schema exists, and zero parameters mean no hidden input behavior.

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 description is one short sentence that states exactly what the tool does. Every word is meaningful and there is no filler or repetition of schema data.

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 zero-parameter read-only tool with an output schema, the description is complete. It tells the agent what is retrieved and leaves no invocation decisions open.

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 tool has zero parameters, so there is no parameter meaning for the description to clarify. Baseline 4 is appropriate because there is nothing the description needs to add.

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 uses a specific verb ('Get') and a specific resource ('the URL of the current page'). The singular 'current page' clearly separates it from sibling tools like get_all_urls or get_origin, so an agent can understand exactly what this tool returns.

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: call this when you need the current page's URL. The description does not explicitly contrast it with get_all_urls, get_origin, or the assert_url tools, but the simple scope makes the intended use fairly obvious.

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