feat: initial release with 48 Mattermost MCP tools

- 27 base tools: channels, messaging, users, reactions, files, DMs
- Team management: invite/remove users, get stats, list members
- Slash commands: execute /remind, /poll, etc.
- Webhook management: incoming and outgoing webhooks
- System tools: server config, logs, bulk status updates
- Channel admin: create, invite, leave, delete channels
- Read-only mode for safe exploration
- Dual token support (bot + PAT) for enhanced security
- Apache 2.0 licensed

pkg/tool/tool.go

@@ -0,0 +1,45 @@
+package tool
+
+import (
+	"github.com/karti-ai/mattermost-mcp-server/pkg/flag"
+	"github.com/mark3labs/mcp-go/server"
+)
+
+type Tool struct {
+	write []server.ServerTool
+	read  []server.ServerTool
+}
+
+func New() *Tool {
+	return &Tool{
+		write: make([]server.ServerTool, 0, 100),
+		read:  make([]server.ServerTool, 0, 100),
+	}
+}
+
+func (t *Tool) RegisterWrite(s server.ServerTool) {
+	t.write = append(t.write, s)
+}
+
+func (t *Tool) RegisterRead(s server.ServerTool) {
+	t.read = append(t.read, s)
+}
+
+func (t *Tool) Tools() []server.ServerTool {
+	tools := make([]server.ServerTool, 0, len(t.write)+len(t.read))
+	if flag.ReadOnly {
+		tools = append(tools, t.read...)
+		return tools
+	}
+	tools = append(tools, t.write...)
+	tools = append(tools, t.read...)
+	return tools
+}
+
+func (t *Tool) ReadTools() []server.ServerTool {
+	return t.read
+}
+
+func (t *Tool) WriteTools() []server.ServerTool {
+	return t.write
+}