sourcemaps_resolve · Yaver MCP: Risk & Policy

WHAT IT DOES

What sourcemaps_resolve does on Yaver

AI agents use sourcemaps_resolve to create or update resources in Yaver — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Yaver environment.

PARAMETERS

Parameter	Type	Required
`app`	string	Yes
`line`	integer	Yes
`column`	integer	Yes
`version`	string	Yes

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why sourcemaps_resolve needs a policy

An AI agent can call sourcemaps_resolve faster than any human can review — one bad instruction and it creates or modifies resources in Yaver by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sourcemaps_resolve Rate-limited

sourcemaps_resolve stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sourcemaps_resolve": {
      "limits": [
        {
          "counter": "sourcemaps_resolve_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Yaver, so you can run agents against it safely.

FAQ

Questions about sourcemaps_resolve

What does the sourcemaps_resolve tool do? +

Resolve a compiled line:col against the stored source map for app+version. Returns {source, line, column, name} or an error when the map is missing. It is categorised as a Write tool in the Yaver MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does sourcemaps_resolve accept? +

sourcemaps_resolve accepts 4 parameters: app, line, column, version. Required: app, line, column, version. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on sourcemaps_resolve? +

Register the Yaver MCP server in PolicyLayer and add a rule for sourcemaps_resolve: 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 sourcemaps_resolve? +

sourcemaps_resolve is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit sourcemaps_resolve? +

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

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

sourcemaps_resolve 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.