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

Goes well beyond the annotations (destructiveHint=true, idempotentHint=false) by disclosing that rating changes invalidate the quote, that SSNs/payment/medical/override/signed-submitted edits are rejected, and that the action neither submits to a carrier nor binds coverage. It also explains the private apply_link handoff workflow. This is unusually rich behavioral context for a mutation tool.

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 core action is front-loaded in the first sentence, followed by constraints, workflow, and a scope disclaimer. Every sentence carries a distinct warning or instruction, though the apply_link/signing instruction is somewhat lengthy and could be trimmed slightly.

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 destructive, nested-object mutation with no output schema, the description covers purpose, prerequisites, rejected inputs, side effects on the quote, the downstream apply_link workflow, and the absence of carrier submission. Nothing an agent needs to invoke it correctly is missing.

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?

With 75% schema coverage the schema already documents most parameters, but the description adds meaning: it clarifies which insured fields are supported (name, email, phone, rating inputs) versus disallowed, and reinforces the private application_token requirement. It adds value above the structured fields without fully re-specifying every parameter.

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?

Uses a specific verb (update) and resource (the primary/joint insured's name, email, phone, or rating inputs) scoped to the eApp created through public MCP. This cleanly separates it from siblings like update_life_eapp_quote (quotes) or create_life_eapp (creation). An agent can identify the target and scope without opening the 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?

States prerequisites clearly (private application_token plus explicit user confirmation) and a consequence rule (rating changes invalidate the selected quote and require fresh quotes). It also enumerates what is NOT accepted. It does not explicitly name a sibling alternative for the quote-update case, so it stops short of full when/when-not routing.

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