| 1 | package agent |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "fmt" |
| 6 | "strings" |
| 7 | ) |
| 8 | |
| 9 | func (r *MCPCapabilityRuntime) serverRegistered(server string) bool { |
| 10 | if r == nil { |
| 11 | return false |
| 12 | } |
| 13 | r.mu.RLock() |
| 14 | _, ok := r.servers[strings.TrimSpace(server)] |
| 15 | r.mu.RUnlock() |
| 16 | return ok |
| 17 | } |
| 18 | |
| 19 | func mcpServerUnregisteredMessage(server string) string { |
| 20 | return fmt.Sprintf("MCP server %q is not registered in this session", server) |
| 21 | } |
| 22 | |
| 23 | func mcpServerDisabledMessage(server string) string { |
| 24 | return fmt.Sprintf("MCP server %q is disabled in this session", server) |
| 25 | } |
| 26 | |
| 27 | func mcpServerUnregisteredError(server string) error { |
| 28 | return errors.New(mcpServerUnregisteredMessage(server)) |
| 29 | } |
| 30 | |
| 31 | func mcpServerDisabledError(server string) error { |
| 32 | return errors.New(mcpServerDisabledMessage(server)) |
| 33 | } |
| 34 | |
| 35 | func (t *UseCapabilityTool) serverRegistered(server string) bool { |
| 36 | if t.runtime != nil { |
| 37 | return t.runtime.serverRegistered(server) |
| 38 | } |
| 39 | // Standalone proxies have no authoritative runtime inventory to miss from. |
| 40 | return true |
| 41 | } |
| 42 | |
| 43 | // serverUnavailableReason distinguishes a disabled server from one this |
| 44 | // session never registered so the refusal points to the correct remedy. |
| 45 | func (t *UseCapabilityTool) serverUnavailableReason(server string) string { |
| 46 | if !t.serverRegistered(server) { |
| 47 | return mcpServerUnregisteredMessage(server) |
| 48 | } |
| 49 | return mcpServerDisabledMessage(server) |
| 50 | } |
| 51 |