2,837 tokens across 13 tools — light (1–5K). Measured 2026-08-16 under methodology v1.0.
| server (self-reported) | chroma v1.6.0 |
| status | measured |
| tokenizer | tiktoken / o200k_base |
| launch command | uvx chroma-mcp |
| isolation | docker · ghcr.io/astral-sh/uv:python3.12-bookworm-slim · network bridge · network enabled for package fetch; clean FS, no host credentials |
| env vars supplied | none |
| canonical SHA-256 | eb0b416a1586989ce3f646259f9f96d0ae6d7b62342aa30393b10ecb7c03c707 |
| category | vendor-official |
| source | https://github.com/chroma-core/chroma-mcp |
| tool | tokens | share | description | schema |
|---|---|---|---|---|
| chroma_get_documents | 610 | 21.5% | 337 | 200 |
| chroma_query_documents | 546 | 19.2% | 310 | 167 |
| chroma_update_documents | 382 | 13.5% | 184 | 165 |
| chroma_add_documents | 194 | 6.8% | 62 | 114 |
| chroma_create_collection | 185 | 6.5% | 85 | 82 |
| chroma_modify_collection | 156 | 5.5% | 48 | 91 |
| chroma_delete_documents | 155 | 5.5% | 79 | 54 |
| chroma_list_collections | 151 | 5.3% | 64 | 64 |
| chroma_fork_collection | 120 | 4.2% | 48 | 54 |
| chroma_peek_collection | 104 | 3.7% | 36 | 50 |
| chroma_get_collection_count | 80 | 2.8% | 27 | 35 |
| chroma_get_collection_info | 79 | 2.8% | 26 | 35 |
| chroma_delete_collection | 73 | 2.6% | 22 | 34 |
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/chroma/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.