qd_add_filter_clause

THE RISK

Medium Risk

Why qd_add_filter_clause needs a policy

The 'add' prefix and context of filter management suggests this tool creates or modifies filter clauses within the QuantData system, making it a Write operation. Severity is medium because filter modifications affect data queries and analysis but are reversible (filters can be removed or edited).

From the tool's definition Tool name 'qd_add_filter_clause' indicates creation or modification of filter configurations. Related sibling tools include 'qd_apply_filter_group', 'qd_create_page', and 'qd_delete_filter_group', establishing a pattern where 'add' and 'create' operations…

Documented attack patterns abuse exactly the kind of access qd_add_filter_clause gives an agent:

POLICY

How to control qd_add_filter_clause

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

policy.json

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

qd_add_filter_clause 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 QuantData 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.

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EXPLORE

Related tools and policies

More QuantData MCP Server tools

Destructive qd_delete_filter_group Delete a filter group permanently. Detaches it from any tools that Destructive qd_delete_page qd_delete_page Destructive qd_remove_filter_clause qd_remove_filter_clause Execute qd_run_page qd_run_page Write qd_detach_filter_group Remove a previously-attached filter group from a tool. Idempotent. Write qd_reset_to_live Remove the time scrubber from a tool — return it to live mode. Write qd_clone_public_filter_group qd_clone_public_filter_group Write qd_add_tool_to_page qd_add_tool_to_page

All 50 QuantData MCP Server tools →

Write tools on other servers

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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 qd_add_filter_clause

What does the qd_add_filter_clause tool do? +

qd_add_filter_clause. It is categorised as a Write tool in the QuantData 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 qd_add_filter_clause? +

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

What risk level is qd_add_filter_clause? +

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

Can I rate-limit qd_add_filter_clause? +

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

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

qd_add_filter_clause is provided by the QuantData MCP Server MCP server (zzulanas/quantdata-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every QuantData MCP Server tool call.

Start from QuantData 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 →