Find all occurrences of the symbol at a position within the same file, classified as text/read/write. Faster and more local than lsp_find_references when you only care about one file (e.g., quick local rename preview or read-vs-write analysis).
AI agents call lsp_document_highlights 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.
This tool queries and returns information about symbol occurrences in a file. It performs no writes, executions, or destructive actions — it is purely a read/query operation used for analysis and preview purposes.
From the tool's definition Find all occurrences of the symbol at a position within the same file, classified as text/read/write. Faster and more local than lsp_find_references when you only care about one file
Attacks that exploit this kind of access
Find all occurrences of the symbol at a position within the same file, classified as text/read/write. Faster and more local than lsp_find_references when you only care about one file (e.g., quick local rename preview or read-vs-write analysis). 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_document_highlights: 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_document_highlights 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_document_highlights 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_document_highlights. 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_document_highlights 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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