vapi_market_estimated_price

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

With no annotations, the description must carry the full behavioral burden, and it does: read-only intent, minPrice string nuance for PACKS/ALPHA, wire type/currency preservation, single logical GET, no continuation-page fetching, local row/size limits, truncation reporting, oversized-record refusal, and filter-forwarding caveats. This is thorough and valuable beyond the bare schema.

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 first sentence is well front-loaded and the description is compact for the amount of behavior it conveys. However, there are grammatical/structural issues ('Makes one logical GET request Does not auto-fetch continuation pages') and at least one boilerplate sentence about filters that is irrelevant to the provided schema.

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?

Given no output schema and no annotations, the description does a good job covering pagination, limits, truncation, refusal behavior, and a key response type nuance. It still leaves the full response shape unstated, but for a simple read tool the practical calling context is largely complete.

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 0%, so the description should define asset and detailId. It merely repeats their names and says they are 'explicit' and required. The policy note about required inputs adds rationale but not meaning, and the 'other declared filters' sentence does not apply to the actual two-parameter schema.

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 opening sentence names a specific operation and resource: 'Read estimated market prices for an explicit asset and detailId.' This is clear and unambiguous. It does not name or contrast any sibling endpoint (e.g., vapi_market_player_listings, market_history), so the agent is left to infer which similar market tool to choose.

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?

There is no when-to-use or when-not-to-use guidance tied to an alternative. 'This is an estimate, not an executable quote' is a useful exclusion, but it names no replacement tool for executable quotes. The rest is behavior rather than selection guidance.

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