agent_graph_start

SERVERYaver SOURCEyaver-cli

High RISK CLASS

Category Execute

Parameters 111 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-kivanccakmak-yaver/agent-graph-start.md

WHAT IT DOES

What agent_graph_start does on Yaver

AI agents invoke agent_graph_start to trigger actions in Yaver. 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
`name`	string	—	Optional graph name
`model`	string	—	Optional forced model
`nodes`	array	—	Optional explicit node list. If omitted, Yaver builds a template graph from prompt/template. Node resource_modes can request self-hosted build, deploy, browser,
`prompt`	string	Yes	Goal for the graph.
`runner`	string	—	Optional forced runner
`template`	string	—	Graph template: full or ship
`work_dir`	string	—	Absolute work directory. Defaults to the current agent work dir.
`max_parallel`	integer	—	Maximum concurrently running nodes
`allowed_devices`	array	—	Optional machine ids or names to form the execution pool
`allowed_runners`	array	—	Optional runner IDs to allow for graph nodes, e.g. ollama, opencode, codex
`preferred_device`	string	—	Optional preferred machine id or name

Parameters from the server's own tool schema.

RISK

Why agent_graph_start is rated High

Initiates autonomous agent execution with resource allocation and cross-device runtime control, potentially triggering unintended operations.

From the tool's definition Start a dependency-aware agent graph, pass allowed_devices, constrain which runners, request resource modes, run build deploy browser sim.

Risk signalsAccepts raw HTML/template content (template) · High parameter count (39 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs agent_graph_start safely

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

agent_graph_start Rate-limited

agent_graph_start 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": {
    "agent_graph_start": {
      "limits": [
        {
          "counter": "agent_graph_start_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 Yaver, apply this rule, and every agent_graph_start call is checked against it from then on.

FAQ

Questions about agent_graph_start

What does the agent_graph_start tool do? +

Start a dependency-aware agent graph. Pass allowed_devices to choose the Yaver mesh pool and allowed_runners to constrain which runners remote nodes may use. Custom nodes can request self-hosted resource modes like build, deploy, browser, sim-ios, sim-android, phone, proof-video, or video-summary and carry prior machine/runner affinity into placement. It is categorised as a Execute tool in the Yaver MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does agent_graph_start accept? +

agent_graph_start accepts 11 parameters: name, model, nodes, prompt, runner, template, work_dir, max_parallel, allowed_devices, allowed_runners, preferred_device. Required: prompt. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on agent_graph_start? +

Register the Yaver MCP server in PolicyLayer and add a rule for agent_graph_start: 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 Yaver. Nothing to install.

What risk level is agent_graph_start? +

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

Can I rate-limit agent_graph_start? +

Yes. Add a rate_limit block to the agent_graph_start 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 agent_graph_start completely? +

Set action: deny in the PolicyLayer policy for agent_graph_start. 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 agent_graph_start? +

agent_graph_start is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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