Fetch a web page

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

Annotations already mark this as read-only and non-destructive. The description goes beyond this by disclosing API credit consumption for new jobs, cache reuse, pending-job behavior with a returned job ID, and the important warning that retrieved content is source material, not instructions. This is rich behavioral context.

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 dense but efficient, with every sentence earning its place. It front-loads the core purpose, then covers cost, cache, forceLive, pending-result routing, and content safety without wasted words.

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 tool with no output schema, this description is remarkably complete: it explains the return format options, the asynchronous job ID path, cost implications, and the sibling tool to use next. An agent has enough context to invoke fetch_page correctly and know what to expect.

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 the schema already documents all four parameters and their behaviors. The description adds useful context about credits, caching, and pending jobs, but it does not materially add new parameter-level meaning beyond what the schema provides.

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 and resource: retrieve one public HTTP/HTTPS web page as text or HTML. It clearly differentiates this tool from the sibling get_fetch_result by saying pending jobs should be handled there.

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?

The description gives explicit guidance on when to use forceLive, explains cache behavior, and names the sibling tool for fetching pending results. It tells the agent exactly when this tool is appropriate and what to do instead in the async case.

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