ga4_update_enhanced_measurement

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

No annotations are provided, so the description carries full burden. It discloses it is a WRITE operation and lists affected toggles, but does not explain side effects (e.g., what happens to unmentioned settings), required permissions, or confirm semantics beyond 'must be true'. Limited behavioral detail beyond basic intent.

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 a single front-loaded sentence with a requirement line. No wasted words, efficiently conveys purpose and prerequisites. Ideal conciseness for a tool description.

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 the complexity (13 parameters, no output schema, no annotations), the description is too brief. It omits crucial details: update semantics (partial vs full overlay), return values, error cases, and validation of data stream type. Lacks completeness for a safe and effective use.

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 low (31%), requiring the description to compensate. The description groups toggles and mentions 'site search + query params' correlating to parameters, but does not explain each parameter individually or clarify update semantics (PATCH vs PUT). Adds some semantic value but not enough to fully compensate for low schema coverage.

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 explicitly states it updates Enhanced Measurement for a WEB data stream, listing specific toggles (scrolls, outbound clicks, etc.). It distinguishes itself from siblings like ga4_enhanced_measurement_get (read-only) and other GA4 update tools by specifying the exact resource and action.

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 clearly states preconditions: requires GA4_MCP_ENABLE_WRITES=true and confirm=true. It provides context that this is a write operation, but does not explicitly compare to siblings or state when not to use it (e.g., read-only use case). The context is sufficient but lacks exclusions.

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