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Arindam200

Reddit MCP Server

get_subreddit_stats

Retrieve detailed statistics and information about any Reddit community, including subscriber counts, rules, features, and moderation details.

Instructions

Get statistics and information about a subreddit.

Args:
    subreddit: Name of the subreddit (with or without 'r/' prefix)

Returns:
    Dictionary containing structured subreddit information with the following structure:
    {
        'id': str,  # Subreddit ID (e.g., '2qgzt')
        'display_name': str,  # Subreddit display name (without r/ prefix)
        'title': str,  # Subreddit title
        'public_description': str,  # Public description
        'description': str,  # Full description (can include markdown)
        'subscribers': int,  # Number of subscribers
        'active_user_count': Optional[int],  # Currently active users if available
        'created_utc': float,  # Creation timestamp (UTC)
        'over18': bool,  # Whether marked as NSFW
        'submission_type': str,  # Allowed submission types (any, link, self)
        'allow_images': bool,  # Whether image uploads are allowed
        'allow_videos': bool,  # Whether video uploads are allowed
        'allow_polls': bool,  # Whether polls are allowed
        'spoilers_enabled': bool,  # Whether spoiler tags are enabled
        'wikienabled': bool,  # Whether wiki is enabled
        'user_is_banned': bool,  # Whether current user is banned
        'user_is_moderator': bool,  # Whether current user is a moderator
        'user_is_subscriber': bool,  # Whether current user is a subscriber
        'mod_permissions': List[str],  # Moderator permissions if applicable
        'metadata': {
            'fetched_at': float,  # Timestamp when data was fetched
            'url': str,  # Full URL to the subreddit
            'moderators_count': int,  # Number of moderators
            'rules': List[Dict],  # Subreddit rules if available
            'features': Dict[str, bool],  # Enabled subreddit features
        }
    }

Raises:
    ValueError: If subreddit is invalid or not found
    RuntimeError: For other errors during the operation

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
subredditYes
Behavior4/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It effectively describes the tool's behavior by detailing the return structure, including fields like 'user_is_banned' and 'mod_permissions' that imply authentication context, and specifies error conditions ('Raises: ValueError, RuntimeError'), adding valuable context beyond basic functionality.

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

Conciseness4/5

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

The description is well-structured with clear sections (Args, Returns, Raises) and front-loaded purpose. However, the detailed return structure is lengthy; while informative, it could be more concise by summarizing key fields rather than listing all, but it remains organized and each part serves a purpose.

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?

Given the tool's complexity (single parameter but rich return data), no annotations, and no output schema, the description is highly complete. It fully documents the parameter, provides a detailed return structure with nested objects, and specifies error handling, making it sufficient for an agent to understand and use the tool effectively.

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

Parameters5/5

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

The schema description coverage is 0%, so the description must compensate. It adds significant meaning beyond the input schema by explaining the 'subreddit' parameter: 'Name of the subreddit (with or without 'r/' prefix)', clarifying format and usage. This fully documents the single parameter, compensating for the lack of schema descriptions.

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 clearly states the tool's purpose with a specific verb ('Get') and resource ('statistics and information about a subreddit'), distinguishing it from siblings like 'get_subreddit_info' (which might return different data) and 'get_trending_subreddits' (which focuses on trending rather than specific subreddit stats). The title 'null' is irrelevant as the description stands alone.

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

Usage Guidelines3/5

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

The description implies usage by specifying it retrieves 'statistics and information about a subreddit', but does not explicitly state when to use this tool versus alternatives like 'get_subreddit_info' or 'get_top_posts'. No exclusions or prerequisites are mentioned, leaving the agent to infer context from the tool name and description alone.

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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