build_etr_possession_chain

SERVERAinumbers Mcp Apps SOURCEpostoaklabs/ainumbers-mcp-apps

High RISK CLASS

Category Execute

Parameters 40 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/postoaklabs-ainumbers-mcp-apps/build-etr-possession-chain.md

WHAT IT DOES

What build_etr_possession_chain does on Ainumbers Mcp Apps

AI agents invoke build_etr_possession_chain to trigger actions in Ainumbers Mcp Apps. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

Parameter	Type	Required	Description
`compute`	string	—	Compute mode (v0.4 Compute Binding). "auto" (default) = server for gpu:false nodes with registered kernels; "server" = force server-side; "browser" = always ret
`parent_hashes`	array	—	execution_hash values from upstream ChainGraph AP2 artifacts to chain from (sets chain.parent_hashes in the export).
`parent_tool_ids`	array	—	tool_id values matching parent_hashes, in the same order.
`policy_parameters`	object	—	Input parameters for this tool's decision function. For gpu:false nodes with a registered kernel, these are computed server-side when compute is "auto" or "serv

Parameters from the server's own tool schema.

RISK

Why build_etr_possession_chain is rated High

Executes cryptographic operations on infrastructure with financial transaction implications and external delegation capabilities.

From the tool's definition Cryptographic compute node, deterministic OpenChainGraph, execution_hash, server-side Cloudflare Workers

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs build_etr_possession_chain safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ainumbers Mcp Apps, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For build_etr_possession_chain, this is the rule to start with:

build_etr_possession_chain Rate-limited

build_etr_possession_chain stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "build_etr_possession_chain": {
      "limits": [
        {
          "counter": "build_etr_possession_chain_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ainumbers Mcp Apps, apply this rule, and every build_etr_possession_chain call is checked against it from then on.

FAQ

Questions about build_etr_possession_chain

What does the build_etr_possession_chain tool do? +

ETR Possession-Chain Receipt Builder: OpenChainGraph compute node (cryptographic_mandate). Deterministic OpenChainGraph compute node. By default (compute:"auto") inputs are computed server-side on Cloudflare Workers for gpu:false nodes with a registered kernel; compute:"browser" forces client-side execution and returns a browser delegation URL instead. gpu:true nodes always delegate to the browser. Inputs are processed transiently to compute the response and are not stored, logged, or retained. Use synthetic or anonymised inputs only. Exports an AP2 artifact with execution_hash for chain provenance. Consumes upstream artifacts from: art-352-etr-control-evidence-checker. Open at: https://ainumbers.co/chaingraph/art-353-etr-possession-chain-builder.html FV-status (published/proven/still-trusted for this spec): /fv-status/8b5ae30d812cd234cfb6068c4ce2022f01d10f2a358979b0f0d73421e09d2543.json — a snapshot, not a subscription; this receipt verifies offline regardless of whether that file is ever fetched. It is categorised as a Execute tool in the Ainumbers Mcp Apps MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does build_etr_possession_chain accept? +

build_etr_possession_chain accepts 4 parameters: compute, parent_hashes, parent_tool_ids, policy_parameters. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on build_etr_possession_chain? +

Register the Ainumbers Mcp Apps MCP server in PolicyLayer and add a rule for build_etr_possession_chain: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Ainumbers Mcp Apps. Nothing to install.

What risk level is build_etr_possession_chain? +

build_etr_possession_chain is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit build_etr_possession_chain? +

Yes. Add a rate_limit block to the build_etr_possession_chain rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block build_etr_possession_chain completely? +

Set action: deny in the PolicyLayer policy for build_etr_possession_chain. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides build_etr_possession_chain? +

build_etr_possession_chain is provided by the Ainumbers Mcp Apps MCP server (postoaklabs/ainumbers-mcp-apps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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