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

Annotations already declare readOnlyHint/idempotentHint/openWorldHint=false, so the safety profile is covered. The description adds substantial context the annotations cannot: the full return shape, the meaning of whatsapp_health.ok=false (Meta account-level problem, sends will fail) and the instruction to relay its message and remediation. It stops short of saying whether the call can be expensive or rate-limited, but for a read-only identity lookup that is minor.

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?

Front-loaded with the purpose in the first sentence, then returns, then failure semantics, then usage conditions. The field list in braces is dense but each item earns its place; the paragraph is longer than strictly necessary but contains no filler or repetition.

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?

With no output schema, the description carries the return-value burden and does so by naming every field and interpreting the one that signals failure. Combined with the usage triggers and the sibling pointer, an agent has everything needed to call it correctly and act on the result.

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?

There are zero parameters, so the baseline is 4. The description goes further by enumerating the returned field names and clarifying two that are easy to misread (owner_email is the workspace owner, plan/subscription_status mirror billing_status).

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?

States a specific verb and resource: 'Identify which DripRaven account/workspace this MCP connection is linked to.' It explicitly separates itself from get_started and references plan/subscription_status mirroring billing_status, so an agent can tell it apart from the closest siblings without opening any schema.

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?

Gives three concrete triggering conditions (user asks who/which account, confirming the right account before making changes, stating the account out loud) and an explicit exclusion routing 'what is this'/'what can you do' to get_started. That is when-to-use, when-not, and the alternative in one place.

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