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

With no annotations, the description carries the full burden and does well: it states the operation is idempotent and safe to re-run, that a breadcrumb is rewritten afterward, that access is restricted to the operator, and that it requires nsec-signed proof. It also discloses the response shape (one step per concern with inline Neon error text), which is more than most tools provide.

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?

Purpose is front-loaded in the first sentence, followed by usage condition, then behavioral detail. It is slightly verbose with invented vocabulary ('breadcrumb'), but every sentence conveys actionable information.

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?

An output schema exists so return values need not be detailed, yet the description still summarizes the per-step error reporting. Auth requirements, safety posture, and idempotency are covered; only the lone parameter's semantics are missing for a complete picture.

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% and the single parameter (dpop_token) is never mentioned in the description; the description talks about 'nsec-signed' proof instead, which does not map onto the actual token parameter. With one undocumented parameter, the description fails to compensate for the coverage gap.

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+resource (re-prepare the operator's database schema) and immediately frames it as a diagnostic/recovery tool, which separates it from unrelated siblings like schwab_restore_credits. The only weakness is the unexplained 'ignoring the breadcrumb' clause, which adds jargon rather than clarity.

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 an explicit trigger condition: use when 'Neon keeps answering 4xx and the operator suspects a table or grant is missing.' That is clear when-to-use guidance, though it names no alternative tool for comparing against other recovery/status paths.

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