toolsCallHandler generate a response for tools call.
(ctx context.Context, id jsonrpc.RequestId, toolset tools.Toolset, resourceMgr *resources.ResourceManager, body []byte, header http.Header)
| 134 | |
| 135 | // toolsCallHandler generate a response for tools call. |
| 136 | func toolsCallHandler(ctx context.Context, id jsonrpc.RequestId, toolset tools.Toolset, resourceMgr *resources.ResourceManager, body []byte, header http.Header) (any, error) { |
| 137 | if header != nil { |
| 138 | if clientIP := util.ExtractClientIP(header); clientIP != "" { |
| 139 | ctx = util.WithClientIP(ctx, clientIP) |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | authServices := resourceMgr.GetAuthServiceMap() |
| 144 | |
| 145 | // retrieve logger from context |
| 146 | logger, err := util.LoggerFromContext(ctx) |
| 147 | if err != nil { |
| 148 | return jsonrpc.NewError(id, jsonrpc.INTERNAL_ERROR, err.Error(), nil), err |
| 149 | } |
| 150 | |
| 151 | var req CallToolRequest |
| 152 | if err = json.Unmarshal(body, &req); err != nil { |
| 153 | err = fmt.Errorf("invalid mcp tools call request: %w", err) |
| 154 | return jsonrpc.NewError(id, jsonrpc.INVALID_REQUEST, err.Error(), nil), err |
| 155 | } |
| 156 | |
| 157 | toolName := req.Params.Name |
| 158 | toolArgument := req.Params.Arguments |
| 159 | logger.DebugContext(ctx, fmt.Sprintf("tool name: %s", toolName)) |
| 160 | |
| 161 | // Update span name and set gen_ai attributes |
| 162 | span := trace.SpanFromContext(ctx) |
| 163 | span.SetName(fmt.Sprintf("%s %s", TOOLS_CALL, toolName)) |
| 164 | span.SetAttributes( |
| 165 | attribute.String("gen_ai.tool.name", toolName), |
| 166 | attribute.String("gen_ai.operation.name", "execute_tool"), |
| 167 | ) |
| 168 | |
| 169 | // Verify tool belongs to the current toolset before resolving globally. |
| 170 | if !toolset.ContainsTool(toolName) { |
| 171 | err = fmt.Errorf("invalid tool name: tool with name %q does not exist", toolName) |
| 172 | return jsonrpc.NewError(id, jsonrpc.INVALID_PARAMS, err.Error(), nil), err |
| 173 | } |
| 174 | |
| 175 | tool, ok := resourceMgr.GetTool(toolName) |
| 176 | if !ok { |
| 177 | err = fmt.Errorf("invalid tool name: tool with name %q does not exist", toolName) |
| 178 | return jsonrpc.NewError(id, jsonrpc.INVALID_PARAMS, err.Error(), nil), err |
| 179 | } |
| 180 | |
| 181 | // Populate gen_ai attributes for operation duration metric |
| 182 | if genAIAttrs := util.GenAIMetricAttrsFromContext(ctx); genAIAttrs != nil { |
| 183 | genAIAttrs.OperationName = "execute_tool" |
| 184 | genAIAttrs.ToolName = toolName |
| 185 | } |
| 186 | |
| 187 | // Get access token |
| 188 | authTokenHeadername, err := tool.GetAuthTokenHeaderName(resourceMgr) |
| 189 | if err != nil { |
| 190 | errMsg := fmt.Errorf("error during invocation: %w", err) |
| 191 | return jsonrpc.NewError(id, jsonrpc.INTERNAL_ERROR, errMsg.Error(), nil), errMsg |
| 192 | } |
| 193 | var accessToken tools.AccessToken |