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feat(netbox): add module-based tool filtering for token optimization

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Reduces NetBox MCP context token consumption from ~19,810 tokens (182 tools)
to ~4,500 tokens (~43 tools) by enabling environment-variable-driven module
filtering.

Key changes:
- Add NETBOX_ENABLED_MODULES env var to config.py
- Filter tool registration based on enabled modules in server.py
- Conditional tool class instantiation for memory efficiency
- Routing guard with clear error messages for disabled modules
- Startup logging shows enabled modules and tool count

Also fixes documentation referencing incorrect tool names:
- virtualization_* → virt_* in cmdb-assistant docs
- wireless_* → wlan_* in README
- circuits_list_circuit_terminations → circ_list_terminations

Recommended config for cmdb-assistant users:
NETBOX_ENABLED_MODULES=dcim,ipam,virtualization,extras

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Leo Miranda
2026-02-03 12:08:46 -05:00
parent a005610a37
commit d9d80d77cb
6 changed files with 250 additions and 26 deletions
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81
mcp-servers/netbox/README.md
View File

@@ -79,6 +79,69 @@ Add to your Claude Code MCP configuration (`~/.config/claude/mcp.json` or projec
1. **System-level** (`~/.config/claude/netbox.env`): Credentials and defaults
2. **Project-level** (`.env` in current directory): Optional overrides
## Module Filtering (Token Optimization)
By default, the NetBox MCP server registers all 182 tools across 8 modules, consuming ~19,810 tokens of context. For most workflows, you only need a subset of modules.
### Configuration
Add `NETBOX_ENABLED_MODULES` to your `~/.config/claude/netbox.env`:
```bash
# Enable only specific modules (comma-separated)
NETBOX_ENABLED_MODULES=dcim,ipam,virtualization,extras
```
If unset, all modules are enabled (backward compatible).
### Available Modules
| Module | Tool Count | Description | cmdb-assistant Commands |
|--------|------------|-------------|------------------------|
| `dcim` | ~60 | Sites, devices, racks, interfaces, cables | `/cmdb-device`, `/cmdb-site`, `/cmdb-search`, `/cmdb-topology` |
| `ipam` | ~40 | IP addresses, prefixes, VLANs, VRFs | `/cmdb-ip`, `/ip-conflicts`, `/cmdb-search` |
| `virtualization` | ~20 | Clusters, VMs, VM interfaces | `/cmdb-search`, `/cmdb-audit`, `/cmdb-register` |
| `extras` | ~12 | Tags, journal entries, audit log | `/change-audit`, `/cmdb-register` |
| `circuits` | ~15 | Providers, circuits, terminations | — |
| `tenancy` | ~12 | Tenants, contacts | — |
| `vpn` | ~15 | Tunnels, IKE/IPSec policies, L2VPN | — |
| `wireless` | ~8 | Wireless LANs, links, groups | — |
### Recommended Configurations
**For cmdb-assistant users** (~43 tools, ~4,500 tokens):
```bash
NETBOX_ENABLED_MODULES=dcim,ipam,virtualization,extras
```
**Basic infrastructure** (~100 tools):
```bash
NETBOX_ENABLED_MODULES=dcim,ipam
```
**Full CMDB** (all modules, ~182 tools):
```bash
# Omit NETBOX_ENABLED_MODULES or set to all modules
NETBOX_ENABLED_MODULES=dcim,ipam,circuits,virtualization,tenancy,vpn,wireless,extras
```
### Startup Logging
On startup, the server logs enabled modules and tool count:
```
NetBox MCP Server initialized: 43 tools registered (modules: dcim, extras, ipam, virtualization)
```
### Disabled Tool Behavior
Calling a tool from a disabled module returns a clear error:
```
Tool 'circuits_list_circuits' is not available (module 'circuits' not enabled).
Enabled modules: dcim, extras, ipam, virtualization
```
## Available Tools
### DCIM (Data Center Infrastructure Management)
@@ -128,18 +191,18 @@ Add to your Claude Code MCP configuration (`~/.config/claude/mcp.json` or projec
| `circuits_create_provider` | Create a provider |
| `circuits_list_circuits` | List circuits |
| `circuits_create_circuit` | Create a circuit |
| `circuits_list_circuit_terminations` | List terminations |
| `circ_list_terminations` | List terminations |
| ... and more |
### Virtualization
| Tool | Description |
|------|-------------|
| `virtualization_list_clusters` | List clusters |
| `virtualization_create_cluster` | Create a cluster |
| `virtualization_list_virtual_machines` | List VMs |
| `virtualization_create_virtual_machine` | Create a VM |
| `virtualization_list_vm_interfaces` | List VM interfaces |
| `virt_list_clusters` | List clusters |
| `virt_create_cluster` | Create a cluster |
| `virt_list_vms` | List VMs |
| `virt_create_vm` | Create a VM |
| `virt_list_vm_ifaces` | List VM interfaces |
| ... and more |
### Tenancy
@@ -167,9 +230,9 @@ Add to your Claude Code MCP configuration (`~/.config/claude/mcp.json` or projec
| Tool | Description |
|------|-------------|
| `wireless_list_wireless_lans` | List wireless LANs |
| `wireless_create_wireless_lan` | Create a WLAN |
| `wireless_list_wireless_links` | List wireless links |
| `wlan_list_lans` | List wireless LANs |
| `wlan_create_lan` | Create a WLAN |
| `wlan_list_links` | List wireless links |
| ... and more |
### Extras