ga4_update_property_access_binding

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

Discloses write nature, required permissions, and environment variable requirements. Lacks details on destructive potential or partial failure, but covers key behavioral aspects for a mutation tool without 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?

Two sentences, efficiently front-loaded with '[GA4 WRITE]', no redundant information. Every word serves a purpose.

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?

Covers purpose, permission, environment variable, updateMask behavior, and confirm requirement. Lacks output details but acceptable given no output schema. Adequate for a mutation tool.

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?

Adds value beyond schema by explaining updateMask derivation: 'Pass only the fields to change; updateMask is derived from them (override with an explicit updateMask for nested paths).' Schema descriptions cover 75% of parameters, and description complements roles and updateMask understanding.

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?

Clearly states it changes user roles on a property, distinguishes from sibling tools like ga4_update_account_access_binding and ga4_create_property_access_binding by specifying 'change' and the resource type.

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?

Provides explicit guidelines: requires analytics.manage.users permission, environment variable GA4_MCP_ENABLE_WRITES=true, and confirm=true. Explains updateMask derivation. Does not explicitly compare to alternatives but context is sufficient.

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