Zinvyl Marketplace Agent Gateway

Get agent purchase requirements

get_purchase_requirements

Read-onlyIdempotent

Use after selecting an offer. Returns the exact price, five-field buy_service contract, delegated-authority requirements, machine-payment route, capacity limits, and authoritative funding rule without creating an intent.

Input Schema

Name	Required	Description	Default
`offer_id`	Yes	Exact published offer ID returned by list_offers or qualify_task.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1",
-  "zinvyl.factory.automation-compliant-market-monitor.v1",
-  "zinvyl.factory.content-instructional-video-pack.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.quality.trace-readiness-check.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1",
+  "zinvyl.factory.content-instructional-video-pack.v1"
+]

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1",
-  "zinvyl.factory.automation-compliant-market-monitor.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1",
+  "zinvyl.factory.content-instructional-video-pack.v1"
+]

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1"
+]

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1"
+]

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1"
+]

Changed1 schema field changedOct 15, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1"
+]

Changed1 schema field changedOct 12, 2026

changedInput schema / properties / offer_id / description

Previous value: -"Exact published offer ID returned by find_service or list_offers."New value: +"Exact published offer ID returned by list_offers or qualify_task."

Changed1 schema field changedOct 12, 2026

changedInput schema / properties / offer_id / description

Previous value: -"Exact published offer ID returned by list_offers or qualify_task."New value: +"Exact published offer ID returned by find_service or list_offers."

Changed1 schema field changedOct 8, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.freight.full-workflow-audit.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1"
+]

AddedOct 6, 2026

TDQS

A3.9/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered by structured data. The description reinforces this with 'without creating an intent,' which is meaningful because the sibling tools in this family do mutate purchase state. Beyond that it does not add rate limits, auth requirements, or freshness behavior.

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

Conciseness4/5

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

Two sentences, each front-loaded with the operative clause: the first states the precondition, the second lists the outputs. The output enumeration is long but every item is a distinct fact an agent needs, so it earns its space rather than padding.

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

Completeness4/5

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

There is no output schema, so spelling out the returned fields (price, contract, authority, payment route, capacity, funding rule) is genuinely valuable and discharges most of the burden. Only the absence of explicit sibling routing guidance keeps it from being fully complete.

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 description coverage is 100% and the single offer_id parameter is a fully enumerated string already documented as coming from list_offers or qualify_task. The description adds no additional meaning about offer_id beyond the schema, so the baseline of 3 applies.

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?

The description names a specific verb (returns) and resource (purchase requirements for a selected offer), then enumerates exactly what those requirements contain: price, the five-field buy_service contract, delegated-authority requirements, payment route, capacity limits, and funding rule. The closing clause 'without creating an intent' cleanly separates it from create_purchase_intent and buy_service.

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

Usage Guidelines4/5

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

'Use after selecting an offer' gives an explicit precondition for calling it, and 'without creating an intent' implies the boundary against the intent-creating sibling. It stops short of naming alternatives like preflight_agent_purchase or prepare_purchase_route, so the agent must infer which of those to prefer.

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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