Agentic Keychain

Get a price quote

get_quote

Read-only

A signed 15-minute price quote with the hosted checkout link. It charges nothing; a purchase requires operator approval in the hosted checkout. Use when: your operator wants the price and the checkout link of a capability that is for sale, for example after an evaluation answered recommend. Not for: deciding whether a capability is worth it (evaluate_capability); a free capability needs no quote. Input: the capability id and, if you evaluated first, the evaluation_id, which links the quote to that evaluation. Output: a quote_id and signed claims bound to the capability version, price, currency, terms and expiry, the checkout link and the unlock request; the price comes from the registry record only.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "capability": "<capability>"
    },
    "name": "get_quote"
  }
}

Input Schema

Name	Required	Description	Default
`capability`	Yes	Capability id (ak:publisher:name or ak:publisher:name:x.y.z), ak:// URI or slug.
`evaluation_id`	No	The evaluation_id from evaluate_capability, if you evaluated first.

Schema Changelog

Changes observed during successful MCP inspections.

First observedSep 28, 2026

TDQS

A4.7/5.0

Behavior5/5

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

Annotations declare readOnlyHint=true and destructiveHint=false, so safety is already covered. The description adds rich context beyond annotations: 'It charges nothing; a purchase requires operator approval in the hosted checkout', the 15-minute expiry, signed claims bound to capability version, and that the price comes from the registry only. No contradiction.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the core purpose, then Use when / Not for / Input / Output in a compact structure with zero waste.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description covers the return values (quote_id, signed claims, checkout link, unlock request). Combined with the behavioral and usage context, an agent has everything needed to call this tool correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already documents both parameters including patterns. The description adds the semantic link (evaluation_id links quote to evaluation) but nothing about syntax or format beyond the schema. Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource with scope: 'signed 15-minute price quote with the hosted checkout link'. It names both the input and output artifacts, and distinguishes itself from siblings like evaluate_capability.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit 'Use when' and 'Not for' clauses name alternatives (evaluate_capability) and the condition that selects them, including the free-capability case. This is the rare definition that fully routes the agent.

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

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