io.github.rcsb/rcsb-mcp
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- FlicenseAqualityDmaintenanceProvides tools to query, retrieve, and download protein structure data from the RCSB Protein Data Bank via the MCP protocol.5-

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TDQS
Scored across 36 tools
Every tool targets a distinct resource or action: searches differ by modality (text, attribute, sequence, chemical, structure, sequence motif, structural motif), resolvers by ontology type, and get tools by entity kind. Descriptions explicitly call out differences, e.g., rcsb_search_by_structure vs rcsb_search_strucmotif, so an agent can reliably pick the right tool.
Tool names overwhelmingly follow rcsb_<verb>_<object> with consistent verb families: search_by_*, get_*, describe_*, find_*, seqcoord_*. The main deviation is rcsb_search_strucmotif lacking the 'by' present in rcsb_search_by_seqmotif, which slightly breaks the otherwise predictable pattern.
36 tools is well beyond the 15-tool typical range and even beyond the 16-25 'heavy' band. While the RCSB PDB archive is a large domain, this many tools makes the MCP surface feel bloated and harder for an agent to navigate efficiently.
The surface is thorough for a read-only structure archive: multiple search modalities (text, attribute, sequence, chemical, structure, motifs), ontology resolvers, schema discovery tools, sequence-coordinate cross-referencing, and retrieval for every entity type (entries, polymers, non-polymers, branched, assemblies, interfaces, groups, UniProt, PubMed). Paging, batching, and reporting are handled, leaving no obvious dead ends.