ga4_update_measurement_protocol_secret

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

No annotations are provided, so the description carries the full burden. It discloses that the operation is a WRITE, describes how updateMask is derived (or can be overridden), and states startup requirements. This gives good behavioral insight without contradicting any annotations.

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 extremely concise: one sentence with a clear prefix and trailing condition. Every word adds value, with no redundancy or filler.

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 4-parameter, required-fields, write operation without output schema, the description covers purpose, usage pattern, and constraints. It does not detail return values, but that is acceptable given the tool's simplicity and the lack of an output schema.

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 75% (3 of 4 parameters have descriptions). The description adds meaning beyond the schema by explaining the updateMask derivation logic and the 'pass only fields to change' pattern, which clarifies parameter interactions and usage.

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 renames a Measurement Protocol secret, using a specific verb and resource. Among many ga4_update_* siblings, it is uniquely identified by targeting 'Measurement Protocol secret'.

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 explains when to use: rename/update a Measurement Protocol secret. It provides explicit requirements (GA4_MCP_ENABLE_WRITES=true, confirm=true) and guidance on the updateMask field. It does not explicitly contrast with alternatives, but the context is sufficient for agent selection.

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