set-company

THE RISK

Medium Risk

Why set-company needs a policy

This tool changes configuration state within Tally Prime (the active company context), which is a reversible write operation. While it doesn't directly access or destroy financial data, it modifies system state that determines which company's data subsequent operations will query or manipulate.

From the tool's definition 'sets the active company context in Tally Prime' and 'changes the global company context used by Tally for subsequent operations'—this modifies state in the ERP system that affects downstream operations.

Documented attack patterns abuse exactly the kind of access set-company gives an agent:

POLICY

How to control set-company

PolicyLayer is an MCP gateway — it sits between your AI agents and Tally Prime MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for set-company:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set-company": {
      "limits": [
        {
          "counter": "set-company_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

set-company 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.

Create a free account and register Tally Prime MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about set-company

What does the set-company tool do? +

sets the active company context in Tally Prime. This changes the global company context used by Tally for subsequent operations and report queries. It is categorised as a Write tool in the Tally Prime 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 set-company? +

Register the Tally Prime MCP Server MCP server in PolicyLayer and add a rule for set-company: 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 Tally Prime MCP Server. Nothing to install.

What risk level is set-company? +

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

Can I rate-limit set-company? +

Yes. Add a rate_limit block to the set-company 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 set-company completely? +

Set action: deny in the PolicyLayer policy for set-company. 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 set-company? +

set-company is provided by the Tally Prime MCP Server MCP server (dhananjay1405/tally-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Tally Prime MCP Server tool call.

Start from Tally Prime MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →