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backblaze-labs

Backblaze B2 MCP Server

Official

s3_delete_objects

Destructive

Delete up to 1000 objects from a Backblaze B2 bucket in one request, with optional version-specific deletion and governance bypass. Use this to clean up storage or remove files in bulk.

Instructions

Delete multiple objects from a B2 bucket with bounded SDK concurrency (up to 1000 objects).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
quietNoIf true, only return errors (not successes) in the response.
bucketYesThe bucket name.
confirmNoConfirm this destructive/irreversible operation. Required when the server destructive policy is 'confirm' (the default).
objectsYesArray of objects to delete.
bypassGovernanceNoIf true, bypass governance-mode Object Lock retention when deleting specific versions. Requires bypassGovernance capability.
Install Server

TDQS

A4/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare destructiveHint=true and readOnlyHint=false, so the destructive nature is covered. The description adds the 'bounded SDK concurrency' detail, but does not add further behavioral context such as irreversibility, versionId effects, or interaction with the confirm parameter.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single sentence with the verb first, the target resource next, and a useful bound trailing; no filler or repetition of schema fields. It earns its place and is immediately scannable.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a destructive batch tool, the schema covers quiet, confirm, objects, and governance, while the description adds the concurrency and batch-size framing. The lack of an output schema is mitigated by the quiet parameter documentation, though a one-line note about response behavior would have made it fully complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all five parameters and their fields. The description only restates the maxItems bound of 1000 objects, adding no new semantic detail beyond the schema baseline.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a concrete action ('Delete multiple objects') plus the exact resource ('B2 bucket') and an explicit scope bound ('up to 1000 objects'). It is immediately distinguishable from the sibling s3_delete_object, which covers the single-object case.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The phrase 'multiple objects' and the explicit 1000-object upper bound provide a clear context for batch deletion versus the single-object sibling. It does not explicitly name s3_delete_object or state when not to use the tool, so it stops just short of full routing guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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