A tool to calculate the mode (most frequent value) of a collection
AI agents call mode_calculator to retrieve information from JeffersonStats without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The mode_calculator performs a read-only statistical computation on provided data. It does not create, modify, delete, execute external code, or commit financial actions. It is consistent with sibling tools on this statistical analysis server (descriptive_statistics_summary, confidence_interval_calculator, etc.) which are all Read-category tools.
From the tool's definition Tool description states it 'calculate[s] the mode (most frequent value)' — a purely computational operation that retrieves/computes a statistic from input data with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
A tool to calculate the mode (most frequent value) of a collection. It is categorised as a Read tool in the JeffersonStats MCP Server, which means it retrieves data without modifying state.
Register the JeffersonStats MCP server in PolicyLayer and add a rule for mode_calculator: 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 JeffersonStats. Nothing to install.
mode_calculator is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the mode_calculator 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.
Set action: deny in the PolicyLayer policy for mode_calculator. 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.
mode_calculator is provided by the JeffersonStats MCP server (sharabhshukla/jeffersonstatsmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →