x_api_validate_account_activity_subscription

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

With no annotations, the description carries full burden and meets it: declares 'Risk: read-only', lists required OAuth scopes and token types, explains environment-selection behavior for scopeTenantId/scopeUserId/scopeAccountId, gives failure conditions, and warns about sensitive data. This goes well beyond basic disclosure.

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 long but well-structured with labeled sections (Use when, Risk, Permissions, etc.). Some redundancy exists: 'Use when: Validate subscription' is tautological, and read-only is mentioned twice. Still, each section serves a purpose and the example is helpful.

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?

Provides expected response shape, common failures, prerequisites, safety warnings, and recommended tools. However, the core semantics of 'validate' (what action is performed) are not explained, and with no output schema, the response shape is only partially described. Generally thorough but with a notable gap.

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 0%, so description must compensate. It explains the roles of scopeTenantId, scopeUserId, scopeAccountId, and credentialKey in the 'Environment-selection behavior' section, but leaves authorizationKey and preferredAuthType unexplained. For webhook_id it only restates 'path, unknown, required'. Partial compensation, not complete.

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 states 'Validate subscription' with a clear verb and resource, and the tool name specifies 'account activity subscription'. It distinguishes from siblings like create/get/delete via the unique 'validate' verb, though it doesn't explicitly contrast with those alternatives. A score of 4 reflects clear purpose with minor ambiguity about what 'validate' entails.

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?

Includes 'Use when' (tautological) and 'Do not use when' (when auth/config tools needed or exploring), plus recommended prerequisite tools like x_schema_discovery and x_auth_get_scope_credentials. It gives some exclusions and context but doesn't explicitly compare to sibling subscription tools, so not a 5.

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