jasper_run_report_sync

THE RISK

High Risk

Why jasper_run_report_sync needs a policy

This tool executes reports on the JasperReports Server, which runs potentially complex queries against data sources, generates documents, and may trigger side effects like resource consumption, logging, or external data access. While report execution is not inherently destructive or financial, it is an Execute category action because it runs code/operations on an external system.

From the tool's definition Tool name contains 'run_report_sync' and description states 'Execute a report synchronously and return the generated content'.

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

POLICY

How to control jasper_run_report_sync

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "jasper_run_report_sync": {
      "limits": [
        {
          "counter": "jasper_run_report_sync_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

jasper_run_report_sync stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 37 Jasperreports tools →

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Go deeper

High-risk tools in Jasperreports → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about jasper_run_report_sync

What does the jasper_run_report_sync tool do? +

Execute a report synchronously and return the generated content. It is categorised as a Execute tool in the Jasperreports MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on jasper_run_report_sync? +

Register the Jasperreports MCP server in PolicyLayer and add a rule for jasper_run_report_sync: 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 Jasperreports. Nothing to install.

What risk level is jasper_run_report_sync? +

jasper_run_report_sync is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit jasper_run_report_sync? +

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

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

jasper_run_report_sync is provided by the Jasperreports MCP server (mr-wolf-gb/jasperreports-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 Jasperreports tool call.

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

CHECK YOUR STACK →