query-option-values

THE RISK

Low Risk

Why query-option-values needs a policy

This tool queries and retrieves reference data (enumerated values for dropdowns) from the Tally Prime system. It performs a simple read operation to fetch metadata about valid field options, with no capability to modify data, execute operations, or cause destructive changes. The blast radius of misuse is minimal—an agent could only learn what values are permitted, not alter any records or system state.

From the tool's definition The tool 'returns predefined option values or drop-down values' and 'returns back object array of pre-defined values'. The description uses only passive retrieval verbs ('returns') with no side effects, modification, or execution implied.

Documented attack patterns abuse exactly the kind of access query-option-values gives an agent:

POLICY

How to control query-option-values

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 query-option-values:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "query-option-values": {}
  }
}

query-option-values is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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FAQ

Questions about query-option-values

What does the query-option-values tool do? +

returns predefined option values or drop-down values for the fields required for master and voucher creation, it returns back object array of pre-defined values. It is categorised as a Read tool in the Tally Prime MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on query-option-values? +

Register the Tally Prime MCP Server MCP server in PolicyLayer and add a rule for query-option-values: 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 query-option-values? +

query-option-values is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit query-option-values? +

Yes. Add a rate_limit block to the query-option-values 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 query-option-values completely? +

Set action: deny in the PolicyLayer policy for query-option-values. 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 query-option-values? +

query-option-values 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 →