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

Annotations declare only readOnlyHint=true, so the description carries real weight here. It adds substantive behavioral context by disclosing the response shape — the individualAccount/companyAccount variants and the bundled contact, address, consent, custom field, membership and timestamp data — plus the underlying Neon GET endpoint. It doesn't cover auth requirements or not-found behavior.

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?

One sentence plus an endpoint reference, with the core action front-loaded. The field enumeration is long but earns its place since there is no output schema to describe the return payload.

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 usefully spells out the returned entity and its components, and the single parameter is fully covered by the schema. Gaps are limited to error/not-found and permission behavior, which are minor for a read-only lookup 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?

Schema description coverage is 100% for the single account_id parameter, so the schema already does the documenting. The description adds no format or syntax detail about the id beyond what the schema states, which is the expected baseline of 3 when the schema is 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?

States a specific verb (fetch) and a scoped resource (one account), and the word 'one' implicitly separates it from neon_list_accounts. It even enumerates the return shape (individualAccount vs companyAccount) with sub-resources, so an agent knows exactly what it gets. It stops short of naming a sibling explicitly, which keeps it out of the top band.

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?

No explicit when-to-use or when-not statement, and no alternatives (neon_list_accounts, neon_update_account) are named. Usage is nonetheless implied by the combination of 'one account' and the required account_id, which tells an agent this is the single-record read path.

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