Function validateMcpToolMetadataForStorage

apps/sim/lib/mcp/tool-limits.ts:158–185

(metadata: {
  toolName?: string | null
  toolDescription?: string | null
  parameterSchema?: unknown
})

}

export function validateMcpToolMetadataForStorage(metadata: {
  toolName?: string | null
  toolDescription?: string | null
  parameterSchema?: unknown
}): string | null {
  if (metadata.toolName && utf8Size(metadata.toolName) > MAX_MCP_TOOL_NAME_BYTES) {
    return `Tool name exceeds maximum size of ${MAX_MCP_TOOL_NAME_BYTES} bytes`
  }

  if (
    metadata.toolDescription &&
    utf8Size(metadata.toolDescription) > MAX_MCP_TOOL_DESCRIPTION_BYTES
  ) {
    return `Tool description exceeds maximum size of ${MAX_MCP_TOOL_DESCRIPTION_BYTES} bytes`
  }

  if (metadata.parameterSchema !== undefined) {
    const parameterSchemaBytes = jsonSize(metadata.parameterSchema)
    if (parameterSchemaBytes === null) {
      return 'Tool parameter schema must be JSON serializable'
    }
    if (parameterSchemaBytes > MAX_MCP_PARAMETER_SCHEMA_BYTES) {
      return `Tool parameter schema exceeds maximum size of ${MAX_MCP_PARAMETER_SCHEMA_BYTES} bytes`
    }
  }

  return null
}