xai-org/grok-build · warning

Required: file_path (string).

Error message

Required: file_path (string).

What it means

The LSP tool's document_symbol operation requires a file_path argument, and the manager validates this before dispatching to the LSP client. If input.file_path is None (the argument was omitted, null, or not a string that survived deserialization), the tool short-circuits with this message telling the caller exactly which argument is missing. It is an argument-contract error, not an LSP failure.

Source

Thrown at crates/codegen/xai-grok-tools/src/implementations/lsp/manager.rs:563

                        .await
                        .map(|l| format_locations_labeled("Definition", &l)),
                    LspOperation::FindReferences => client
                        .goto_references(&path, line, col)
                        .await
                        .map(|l| format_locations_labeled("References", &l)),
                    LspOperation::GoToImplementation => client
                        .goto_implementation(&path, line, col)
                        .await
                        .map(|l| format_locations_labeled("Implementations", &l)),
                    LspOperation::Hover => client.hover(&path, line, col).await.map(|opt| {
                        opt.unwrap_or_else(|| "No hover information available.".to_string())
                    }),
                    _ => unreachable!(),
                }
            }
            LspOperation::DocumentSymbol => {
                let Some(ref file_path) = input.file_path else {
                    return err("Required: file_path (string).".into());
                };
                let path = PathBuf::from(file_path);
                let Some(client) = self.client_for_file_mut(&path) else {
                    return err(format!("No LSP server configured for {}", path.display()));
                };
                client
                    .document_symbols(&path)
                    .await
                    .map(|s| format_symbols(&s))
            }
            LspOperation::WorkspaceSymbol => {
                let Some(ref query) = input.query else {
                    return err("Required: query (string).".into());
                };
                if self.clients.is_empty() {
                    return err("No LSP servers are running.".into());
                }
                let mut all_symbols = Vec::new();

View on GitHub (pinned to bc7f02eddd)

Solutions

1. Re-issue the tool call including file_path as a non-empty string (e.g. "src/main.rs").
2. Check the tool's input schema and ensure file_path is listed/required for the document_symbol operation.
3. If you build calls programmatically, validate the argument set before invoking the manager.

Example fix

// before
{ "operation": "document_symbol" }
// after
{ "operation": "document_symbol", "file_path": "src/main.rs" }

function validateDocumentSymbolArgs(input) {
  if (typeof input.file_path !== 'string' || input.file_path.length === 0) {
    throw new Error('document_symbol requires a non-empty file_path string');
  }
  return true;
}

function hasFilePath(input): input is { file_path: string } & typeof input {
  return typeof (input as any).file_path === 'string' && (input as any).file_path.length > 0;
}

When it happens

Trigger: Calling the lsp tool with operation "document_symbol" but omitting the file_path field, passing file_path: null, or an agent/model hallucinating a tool call that drops the argument.

Common situations: LLM agents constructing tool JSON by hand and forgetting required fields; schemas that mark file_path optional; wrappers that strip empty-string/null params before forwarding.

Understand the failure class

Background: Missing required parameter errors: what 'X is required' and 'the required X param is missing' mean, and how to fix them — this error's family across 27 libraries.

Related errors

• Required: query (string).
• Required: file_path (string), line (int), character (int).
• no target specified
• invalid worktree id {:?}
• {LOCAL_WORKSPACE_ATTACH_NEEDS_SERVER_ID}

AI-assisted analysis of xai-org/grok-build@bc7f02eddd (2026-08-31). Data as JSON: /api/errors/4189df460b1ce3d3. Report an issue: GitHub.