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googlarz

Proton Mail Bridge MCP

sync_folders

Read-only

Synchronize the folder list with the IMAP server to reflect external changes from Proton webmail. Use when get_folders returns outdated data.

Instructions

Refresh the in-memory folder list from the IMAP server and return the updated list. Use when folders have been created, renamed, or deleted externally (e.g. via Proton webmail) and get_folders is returning stale data. Prefer get_folders for a read-only view that does not force a refresh.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior5/5

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

Discloses that it forces a refresh and returns updated list; annotations only provide readOnlyHint which is consistent with server-side read.

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?

Two concise sentences, front-loaded with purpose, no wasted words.

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

Completeness5/5

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

For a zero-parameter tool with no output schema, the description fully explains behavior and usage context.

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

Parameters4/5

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

No parameters; schema coverage is 100%; baseline 4 applies as no additional parameter info needed.

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?

Clearly states the verb 'Refresh' and resource 'folder list', and distinguishes from sibling get_folders by emphasizing it forces a refresh.

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

Usage Guidelines5/5

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

Explicitly says to use when folders changed externally and get_folders is stale, and to prefer get_folders for a read-only view.

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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