2,823 tokens across 14 tools — light (1–5K). Measured 2026-08-16 under methodology v1.0.
| server (self-reported) | secure-filesystem-server v0.2.0 |
| status | measured |
| tokenizer | tiktoken / o200k_base |
| launch command | npx -y @modelcontextprotocol/server-filesystem /tmp |
| isolation | docker · public.ecr.aws/docker/library/node:22-slim · network bridge · network enabled for package fetch; clean FS, no host credentials |
| env vars supplied | none |
| canonical SHA-256 | 245b04832111268c3fcc72543af89fb2f8c109d8306c1b5b8c49dc45977e41e1 |
| category | official-reference |
| source | https://github.com/modelcontextprotocol/servers |
| tool | tokens | share | description | schema |
|---|---|---|---|---|
| read_media_file | 290 | 10.3% | 47 | 34 |
| read_text_file | 256 | 9.1% | 97 | 78 |
| edit_file | 245 | 8.7% | 35 | 118 |
| search_files | 218 | 7.7% | 79 | 60 |
| read_multiple_files | 210 | 7.4% | 58 | 71 |
| directory_tree | 202 | 7.2% | 72 | 51 |
| list_directory_with_sizes | 201 | 7.1% | 56 | 62 |
| move_file | 192 | 6.8% | 57 | 43 |
| read_file | 179 | 6.3% | 19 | 78 |
| create_directory | 177 | 6.3% | 51 | 34 |
| write_file | 174 | 6.2% | 39 | 43 |
| list_directory | 166 | 5.9% | 53 | 34 |
| get_file_info | 162 | 5.7% | 47 | 34 |
| list_allowed_directories | 149 | 5.3% | 41 | 24 |
Each tool is tokenized on its own, so the parts do not sum exactly to the whole: the array adds its own brackets and commas, and the tokenizer merges tokens across object boundaries. The badge number is always the count of the whole array, never a sum of parts.
npx -y mcp-context-cost verify results/filesystem/measurement.json
That re-tokenizes the published capture and checks the count and the hash. If it disagrees with the badge, the badge is wrong — open an issue and it gets corrected.