Get all errors and warnings across the entire project—no file path needed. Use during initial analysis to find problems or after changes to check overall project health. Only includes files opened in this session.
AI agents call lsp_workspace_diagnostics to retrieve information from Lsp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
lsp_workspace_diagnostics performs a read-only query of diagnostic metadata (linting/compilation warnings and errors) that language servers have already computed. It returns information without side effects, matching the Read category (retrieve/query data). The constraint 'Only includes files opened in this session' further limits scope and impact.
From the tool's definition Tool retrieves diagnostic information ('errors and warnings') across the project with 'no file path needed'.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Get all errors and warnings across the entire project—no file path needed. Use during initial analysis to find problems or after changes to check overall project health. Only includes files opened in this session. It is categorised as a Read tool in the Lsp MCP Server, which means it retrieves data without modifying state.
Register the Lsp MCP server in PolicyLayer and add a rule for lsp_workspace_diagnostics: 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 Lsp. Nothing to install.
lsp_workspace_diagnostics 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 lsp_workspace_diagnostics 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 lsp_workspace_diagnostics. 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.
lsp_workspace_diagnostics is provided by the Lsp MCP server (lsp-mcp-server). 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.
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