upload_contract_pdf · Sanka MCP Server MCP: Risk & Policy

WHAT IT DOES

What upload_contract_pdf does on Sanka MCP Server

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

WHY IT NEEDS A POLICY

Why upload_contract_pdf needs a policy

This tool creates a new contract record in the system, which is a reversible write operation. It does not execute code, delete data, or move money. While contracts have business significance, the creation of a draft (not finalization) and the reversibility of draft deletion keeps this in the Write category rather than higher severity.

From the tool's definition Tool description states 'Upload a PDF and create a draft Sanka Contract from it' — the action creates new data (a draft contract) in the system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upload_contract_pdf Rate-limited

upload_contract_pdf 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": {
    "upload_contract_pdf": {
      "limits": [
        {
          "counter": "upload_contract_pdf_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 Sanka MCP Server, so you can run agents against it safely.

FAQ

Questions about upload_contract_pdf

What does the upload_contract_pdf tool do? +

Upload a PDF and create a draft Sanka Contract from it. It is categorised as a Write tool in the Sanka 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 upload_contract_pdf? +

Register the Sanka MCP Server MCP server in PolicyLayer and add a rule for upload_contract_pdf: 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 Sanka MCP Server. Nothing to install.

What risk level is upload_contract_pdf? +

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

Can I rate-limit upload_contract_pdf? +

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

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

upload_contract_pdf is provided by the Sanka MCP Server MCP server (sankahq/sanka-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.