AI agents call compute_statistics to retrieve information from Workhour without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs computational analysis and aggregation of timesheet statistics. It retrieves and processes data to generate reports/summaries, which is characteristic of Read operations. No side effects, data creation, modification, deletion, or execution of external code is described. The low severity reflects that misuse would only expose aggregated statistics without material impact.
From the tool's definition Tool name 'compute_statistics' with description '工时统计分析（汇总/分组）' (work hour statistical analysis / aggregation / grouping) describes analysis and summarization of existing data without modification or deletion.
Attacks that exploit this kind of access
工时统计分析（汇总/分组）。. It is categorised as a Read tool in the Workhour MCP Server, which means it retrieves data without modifying state.
Register the Workhour MCP server in PolicyLayer and add a rule for compute_statistics: 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 Workhour. Nothing to install.
compute_statistics 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 compute_statistics 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 compute_statistics. 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.
compute_statistics is provided by the Workhour MCP server (Calvin-Ca/workhour-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
compute_statistics is one line of Workhour's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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