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Backblaze B2 MCP Server

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One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

TDQS

A3.9/5.0

Scored across 40 tools

Disambiguation4/5

The b2_/s3_ prefix split plus verb_noun naming makes most tools clearly distinct. The main overlap risk is b2_unfinished_uploads vs s3_list_multipart_uploads, which both enumerate in-progress multipart uploads, and the three analytics tools (largest files, egress leaders, usage growth) sit close together, though their descriptions and cross-references draw clear boundaries.

Naming Consistency4/5

Nearly all 40 tools follow a consistent family_verb_noun pattern in snake_case, with b2_* marking the native API and s3_* the S3-compatible surface. The one outlier, b2_reserve_trial_create_account, awkwardly stacks two verbs, and the analytics tools use descriptive noun phrases, but these are minor deviations from an otherwise highly predictable scheme.

Tool Count2/5

40 tools is well above the 25+ threshold for a heavy surface, and the dual native/S3 API families double up on several operations (bucket checking, lifecycle, multipart listing). The breadth is partly defensible given two API surfaces plus partner management and analytics, but an agent must sift through a very large tool set to select correctly.

Completeness4/5

Bucket, object, key, multipart, notification, retention, legal-hold, and analytics workflows are all well covered with no dead ends. Minor gaps include no S3 get-bucket-lifecycle reader (mitigated by b2_list_buckets returning lifecycle rules), no group-creation/update tool in the Partner API, and file retention/legal-hold state only being readable via S3 metadata headers.

Maintenance

ActivityActive
ResponsivenessUnresponsive

Resources