intercept_and_modify_traffic

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

The description adds some behavioral context by stating it preserves cookies and authentication and operates 'before sending'. However, it does not disclose potential side effects, whether modifications are temporary or persistent, or how it interacts with response capture. With no annotations, the description carries the full burden but only partially covers it.

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 two sentences, directly states the main purpose, and adds key capabilities without redundancy. It is concise and well-structured, front-loading the core function.

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 of moderate complexity with a rich input schema and no output schema, the description adequately covers the purpose, key preservation behavior, and modification scope. It could be more complete with added context on when to use it or relationship to capture tools, but it is sufficient for the basic use case.

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 description coverage is 100%, and the schema already provides detailed parameter descriptions, including examples and type clarifications (e.g., 'NOT string'). The description does not add further parameter semantics, so a baseline score of 3 is appropriate.

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 clearly states the tool's function: intercepting and modifying network requests in real-time. It lists specific capabilities (header/body/method changes) and distinguishes itself from sibling tools like add_custom_header_to_request (which only adds headers) and capture_network_on_action (which only captures).

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 implies usage for when network requests need to be modified before sending, but does not explicitly state when to use this tool versus alternatives. There is no mention of exclusions or alternative tools, so the guidance relies on inference from the description and sibling names.

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