create_blob_trace

SERVERtdmcp — TouchDesigner MCP server SOURCE@dpantani/tdmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-pantani-tdmcp/create-blob-trace.md

WHAT IT DOES

What create_blob_trace does on tdmcp — TouchDesigner MCP server

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

RISK

Why create_blob_trace is rated Medium

This tool modifies the TouchDesigner project state by creating new vector geometry and visual elements (traced blobs rendered as wireframe). While the output is reversible (can be undone or deleted), it constitutes creation of new data structures and visual content. It does not execute arbitrary code (Execute), destroy data (Destructive), move money (Financial), or merely read existing data (Read).

From the tool's definition Tool creates and generates vector line art from blob contours ('Trace SOP (mask-to-polyline) → wireframe render'), producing new visual artifacts in TouchDesigner that are stored and reversible.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_blob_trace safely

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

create_blob_trace Rate-limited

create_blob_trace 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": {
    "create_blob_trace": {
      "limits": [
        {
          "counter": "create_blob_trace_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect tdmcp — TouchDesigner MCP server, apply this rule, and every create_blob_trace call is checked against it from then on.

FAQ

Questions about create_blob_trace

What does the create_blob_trace tool do? +

Trace the contour/outline of a blob or silhouette into vector line art: source → monochrome → blur → threshold (the blob mask, optionally inverted) → optional Edge (boundary-band only) → Trace SOP (mask-to-polyline) → wireframe render. This is the CONTOUR-TRACE complement to create_vector_lines (full image vectoriser) and export_sop_to_svg, and is distinct from create_blob_reactive (which tracks blob position/reactivity — it does not draw the outline). Source can be the live camera (may prompt for macOS permission), a movie file, an animated synthetic blob (testable without a camera), or an existing TOP. Creates a new baseCOMP under. It is categorised as a Write tool in the tdmcp — TouchDesigner MCP server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_blob_trace? +

Register the tdmcp — TouchDesigner MCP server MCP server in PolicyLayer and add a rule for create_blob_trace: 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 tdmcp — TouchDesigner MCP server. Nothing to install.

What risk level is create_blob_trace? +

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

Can I rate-limit create_blob_trace? +

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

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

create_blob_trace is provided by the tdmcp — TouchDesigner MCP server MCP server (@dpantani/tdmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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