create_web_data_stream

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

No annotations are provided, so the description carries full burden. It does not disclose behavioral traits such as destructive potential, required permissions, idempotency, or error conditions. Only the return value is mentioned.

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 concise at two sentences, front-loading the purpose and return value. However, it could benefit from listing the parameters or structuring the information more clearly.

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?

Given three required parameters with 0% schema description coverage, no annotations, and an output schema only hinted at, the description lacks crucial context such as parameter formats, prerequisites, and side effects. It is incomplete for a tool that creates resources.

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 0%. The description only adds meaning for property_id (numeric or properties/<id>), but does not explain stream_name or website_url. Two of three required parameters are left entirely to the schema without hints.

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 action 'Create a web data stream for a GA4 property' with a specific verb and resource, and mentions the return value (measurement_id). It distinguishes itself from sibling tools which focus on auth, integration, or provisioning.

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?

No guidance on when to use this tool vs. alternatives. The sibling tools list is provided but without any comparison or context (e.g., prerequisites like having a GA4 property already).

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