stacksfinder-mcp
The StacksFinder MCP server provides deterministic tech stack recommendations and analysis tools for developers working with LLM clients like Claude, Cursor, and VS Code.
Core Capabilities:
Technology Discovery & Analysis (No API Key Required)
List available technologies across 8 categories (frontend, backend, meta-framework, database, ORM, auth, hosting, payments)
Analyze individual technologies with 6-dimension scoring (performance, DX, ecosystem, maintainability, cost, compliance) that adapts to project context (default, MVP, enterprise)
Compare 2-4 technologies side-by-side with per-dimension winners and compatibility analysis
Get daily free demo stack recommendations for various project types and scales
Stack Recommendations (Requires API Key)
Generate unlimited custom recommendations with support for 9 project types, 4 scale levels, up to 3 custom priorities (time-to-market, scalability, developer-experience, cost-efficiency, performance, security, maintainability), and technology constraints to include/exclude specific tools
Blueprint Management (Requires API Key)
Create comprehensive project blueprints with AI-generated narratives and implementation guidance
Fetch existing blueprints by UUID with support for asynchronous generation and optional polling
Project Estimation (Requires API Key)
Get comprehensive project scope, pricing, and market analysis with detailed feature breakdowns and cost adjustments
Technical Audits (Requires API Key)
Run technical debt audits on existing stacks
Retrieve, list, and compare audit reports to track progress
Get migration recommendations
MCP Integration Tools (No API Key Required)
Generate optimal tech stacks with MCP recommendations from project descriptions
Analyze repositories to identify relevant MCP servers
Prepare and execute MCP installations with
.env-mcptemplates
API Key Management (Requires Credentials)
Authenticate with email/password to create API keys
List and revoke existing keys for access management
Cross-Platform Support: Works with Claude Desktop, Claude Code, Cursor, Windsurf, VS Code + Copilot, and ChatGPT Developer Mode.
Provides tech stack recommendations and analysis for Drizzle ORM, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for Next.js, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions, with support for technology comparisons.
Provides tech stack recommendations and analysis for Nuxt, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions, with support for technology comparisons.
Provides tech stack recommendations and analysis for Paddle payment integration, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for PlanetScale database, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for PostgreSQL database, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for SQLite database, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for Supabase, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for SvelteKit, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions, with support for technology comparisons.
Provides tech stack recommendations and analysis for Turso database, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Provides tech stack recommendations and analysis for Vercel hosting platform, including scoring across performance, developer experience, ecosystem, maintainability, cost, and compliance dimensions.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@stacksfinder-mcprecommend a stack for a startup mvp with react"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
@stacksfinder/mcp-server
MCP (Model Context Protocol) server that brings deterministic tech stack recommendations to LLM clients like Claude, Cursor, Windsurf, and other MCP-compatible tools.
Try it free — 8 tools work without an account, including a daily demo recommendation and MCP project kit.
Quick Start
Claude Code (CLI)
# macOS/Linux
claude mcp add stacksfinder npx -y @stacksfinder/mcp-server
# Windows (requires cmd wrapper)
claude mcp add-json stacksfinder '{
"command": "cmd",
"args": ["/c", "npx", "-y", "@stacksfinder/mcp-server"],
"env": {"STACKSFINDER_API_KEY": "sk_live_xxx"}
}'
# With API key (macOS/Linux)
claude mcp add-json stacksfinder '{
"command": "npx",
"args": ["-y", "@stacksfinder/mcp-server"],
"env": {"STACKSFINDER_API_KEY": "sk_live_xxx"}
}'Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):
macOS/Linux:
{
"mcpServers": {
"stacksfinder": {
"command": "npx",
"args": ["-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}Windows:
{
"mcpServers": {
"stacksfinder": {
"command": "cmd",
"args": ["/c", "npx", "-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}Cursor / Windsurf
Add to .cursor/mcp.json or .windsurf/mcp.json in your project root:
macOS/Linux:
{
"mcpServers": {
"stacksfinder": {
"command": "npx",
"args": ["-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}Windows:
{
"mcpServers": {
"stacksfinder": {
"command": "cmd",
"args": ["/c", "npx", "-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}VS Code + Copilot
Add to .vscode/mcp.json:
macOS/Linux:
{
"servers": {
"stacksfinder": {
"command": "npx",
"args": ["-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}Windows:
{
"servers": {
"stacksfinder": {
"command": "cmd",
"args": ["/c", "npx", "-y", "@stacksfinder/mcp-server"],
"env": {
"STACKSFINDER_API_KEY": "sk_live_xxx"
}
}
}
}ChatGPT Developer Mode
StacksFinder is compatible with ChatGPT Developer Mode (available on Pro, Plus, Business, Enterprise, and Education accounts).
Prerequisites
ChatGPT Pro, Plus, Business, Enterprise, or Education account
Developer Mode enabled in ChatGPT settings
Note: Business/Enterprise workspaces may require admin approval
Setup Steps
Enable Developer Mode: Go to Settings → Apps → Advanced settings → toggle "Developer mode"
Create App: Go to Settings → Apps → Create
Enter details:
Name: StacksFinder
URL:
https://smithery.ai/server/hoklims/stacksfinder-mcp/mcp(or your self-hosted URL)Protocol: Streaming HTTP
Description: Deterministic tech stack recommendations
Verify: Click Create and confirm the 23 tools appear
Important Notes
Developer Mode does NOT require search/fetch tools (those are only for Deep Research)
Tools with
readOnlyHint: truewon't ask for confirmation in ChatGPTRate limited to 60 requests/minute per IP
Uses Streaming HTTP transport (not SSE)
Supported Protocols
Protocol | Status |
Streaming HTTP | ✅ Supported |
SSE | ❌ Not supported |
Related MCP server: mcp-github
Available Tools
Free Tools (no account required)
Tool | Description |
| List all 80+ tech IDs by category |
| 6-dimension scores, strengths, weaknesses, compatible techs |
| Side-by-side comparison of 2-4 technologies |
| FREE 1x/day — Full stack recommendation for any project type |
Estimator Tools (requires API key)
Tool | Description |
| Estimate scope, pricing, and market analysis for a project |
| Check your remaining estimate quota (weekly/monthly) |
Pro Tools (requires API key)
Tool | Description |
| Unlimited recommendations with priorities & constraints |
| Fetch existing blueprint by ID |
| Generate new blueprint with AI narrative |
| Authenticate and create API key from MCP |
| List your API keys |
| Revoke an API key |
Audit Tools (requires API key)
Tool | Description |
| Run technical debt audit on your stack |
| Fetch audit report by ID |
| List your audit reports |
| Compare two audits to track progress |
| Check your remaining audit quota |
| Analyze audit for migration opportunities with builder constraints |
Project Kit Tools (no API key required)
Tool | Description |
| Generate optimal tech stack + MCP recommendations from project description |
| Analyze your repository and recommend relevant MCP servers |
| Detect MCPs, generate |
| Parse |
Get your API key at stacksfinder.com/pricing
Tool Examples
list_technologies
> list_technologies category="database"
Available databases:
- postgres (PostgreSQL)
- sqlite (SQLite)
- supabase (Supabase)
- planetscale (PlanetScale)
- turso (Turso)
- neon (Neon)analyze_tech
> analyze_tech technology="sveltekit" context="mvp"
## SvelteKit Analysis (MVP Context)
| Dimension | Score | Grade |
|-----------|-------|-------|
| Performance | 92 | A |
| DX | 88 | A |
| Ecosystem | 72 | B |
| Maintainability | 85 | A |
| Cost | 90 | A |
| Compliance | 75 | B |
**Overall: 84/100 (A)**
Strengths:
- Compiler-first architecture, tiny bundles
- Excellent TypeScript support
- Built-in SSR, SSG, and edge rendering
Weaknesses:
- Smaller ecosystem than React
- Fewer enterprise case studiescompare_techs
> compare_techs technologies=["nextjs", "sveltekit", "nuxt"]
## Comparison: Next.js vs SvelteKit vs Nuxt
| Tech | Score | Grade |
|------|-------|-------|
| Next.js | 82 | A |
| SvelteKit | 84 | A |
| Nuxt | 79 | B |
Per-dimension winners:
- Performance: SvelteKit (+10)
- DX: SvelteKit (+3)
- Ecosystem: Next.js (+15)recommend_stack (Free Demo)
> recommend_stack projectType="saas" scale="mvp"
## Recommended Stack for SaaS (MVP)
| Category | Technology | Score | Grade |
|----------|------------|-------|-------|
| meta-framework | SvelteKit | 84 | A |
| database | Supabase | 82 | A |
| orm | Drizzle | 86 | A |
| auth | Better Auth | 80 | A |
| hosting | Vercel | 85 | A |
| payments | Paddle | 86 | A |
**Confidence**: medium (demo mode)
---
Want more? Upgrade to Pro for custom priorities, constraints, and AI narratives.create_audit (Pro)
> create_audit name="Q1 2026 Review" technologies=[{name:"react",version:"18.2.0"},{name:"lodash",version:"4.17.20"},{name:"express",version:"4.17.0"}]
## Audit Report: Q1 2026 Review
**Health Score: 72/100** (warning)
| Severity | Count |
|----------|-------|
| [CRITICAL] | 2 |
| [HIGH] | 1 |
| [MEDIUM] | 3 |
| [LOW] | 2 |
| [INFO] | 5 |
### Critical Findings
**[CRITICAL] Security vulnerability in lodash** (lodash 4.17.20)
CVE-2021-23337 - Prototype pollution vulnerability
> Upgrade to lodash 4.17.21 or later
**[CRITICAL] Outdated Express version** (express 4.17.0)
Express 4.17.0 is missing security patches
> Upgrade to express 4.21+ for security fixescompare_audits (Pro)
> compare_audits baseAuditId="uuid-jan" compareAuditId="uuid-mar"
## Audit Comparison
**Trend: Improving** (+16 health score)
| Metric | January | March |
|--------|---------|-------|
| Health Score | 62 | 78 |
| Critical | 4 | 1 |
| High | 6 | 3 |
### Resolved Issues (6)
- [x] Critical: lodash vulnerability
- [x] High: moment.js deprecation
- [x] High: outdated Node versionestimate_project (Pro)
> estimate_project specs="Build a SaaS project management tool with: user authentication, team workspaces, task boards with drag-and-drop, real-time collaboration, file attachments, Stripe billing integration, and email notifications. Target: small to medium teams." region="france" seniorityLevel="mid"
## Project Estimate
**ID**: `est_abc123`
**Confidence**: 85%
**Pricing Table Version**: 2026-01
### Scope Analysis
**Total Hours**: 280 - 420h
**Complexity**: high
**Buffer**: 10% (28-42h)
#### Feature Breakdown
| Feature | Hours | Complexity |
|---------|-------|------------|
| User Authentication | 16-24h | simple |
| Team Workspaces | 32-48h | medium |
| Task Boards | 48-72h | complex |
| Real-time Collaboration | 40-60h | complex |
| File Attachments | 24-36h | medium |
| Stripe Integration | 32-48h | medium |
| Email Notifications | 16-24h | simple |
### Pricing (EUR)
| Seniority | Min | Max |
|-----------|-----|-----|
| junior | 12 000 € | 21 000 € |
| mid | 18 000 € | 33 000 € |
| senior | 28 000 € | 50 400 € |
| expert | 40 000 € | 75 600 € |
**Adjustments Applied** (×1.15):
- Payment Integration: +5%
- Real-time Features: +10%generate_mcp_kit (Free)
> generate_mcp_kit projectDescription="I'm building a SaaS for project management with Supabase and Stripe"
## Recommended Tech Stack
| Category | Technology | Score |
|----------|------------|-------|
| meta-framework | SvelteKit | 84 |
| database | Supabase | 82 |
| auth | Supabase Auth | 80 |
| payments | Stripe | 96 |
## Recommended MCPs
| MCP | Priority | Why |
|-----|----------|-----|
| supabase-mcp | High | Direct database access |
| stripe-mcp | High | Payment management |
| context7 | Medium | Documentation lookup |
## Install Configs
Claude Code:
claude mcp add supabase-mcp npx -y @supabase/mcp-serveranalyze_repo_mcps (Free)
> analyze_repo_mcps
## Detected Technologies
- **Frontend**: SvelteKit (2.x)
- **Database**: PostgreSQL (via Drizzle)
- **Auth**: Lucia
- **Payments**: Paddle
## Recommended MCPs
### High Priority
**Neon MCP** (`@neondatabase/mcp-server`)
- Direct database access and query execution
- _Matched: drizzle, postgresql_
### Medium Priority
**Context7** (`context7`)
- Up-to-date documentation for any library
- _Matched: universal_prepare_mcp_installation (Free)
> prepare_mcp_installation
✅ Created .env-mcp with 3 MCPs requiring configuration.
## MCPs to Install
### 🔴 High Priority
- **Neon MCP** (1 required vars)
- **Paddle MCP** (2 required vars)
### 🟢 Low Priority
- **Context7** (0 required vars)
Edit .env-mcp to add your credentials, then run execute_mcp_installation.execute_mcp_installation (Free)
> execute_mcp_installation targetClient="claude-code"
✅ 2 MCPs ready, 1 pending credentials.
## Claude Code Installation
Run this command to install all ready MCPs:
claude mcp add neon-mcp npx -y @neondatabase/mcp-server && \
claude mcp add context7 npx -y context7
## Post-Installation
- Restart Claude Code to load new MCPs
- Run `claude mcp list` to verify installationEnvironment Variables
Variable | Required | Default | Description |
| For Pro tools | - | API key from stacksfinder.com |
| No |
| API base URL |
| No |
| Enable debug logging |
Score Dimensions
All technology scores are measured across 6 dimensions (0-100):
Dimension | Description |
Performance | Runtime speed, bundle size, optimization potential |
DX | Learning curve, tooling, documentation quality |
Ecosystem | Community size, integrations, job market |
Maintainability | Long-term code health, upgrade path |
Cost | Hosting costs, licensing, operational overhead |
Compliance | Security features, audit readiness |
Contexts
Scores vary by project context:
default: General-purpose scores
mvp: Optimized for speed-to-market, lower cost
enterprise: Emphasizes compliance, maintainability, support
Error Handling
Structured errors with suggestions:
**Error (TECH_NOT_FOUND)**: Technology "nexjs" not found.
**Suggestions**: nextjs, nuxt, nestjsTroubleshooting
Debug mode
STACKSFINDER_MCP_DEBUG=true npx @stacksfinder/mcp-serverCommon issues
Issue | Solution |
"API key required" | Get key at stacksfinder.com/pricing |
"Daily limit reached" | Wait 24h or upgrade to Pro |
"Technology not found" | Use |
Development
cd packages/mcp-server
bun install
bun run build
bun run dev # Watch mode
bun test # Run testsContributing
Contributions are welcome! Please read our Contributing Guide before submitting a Pull Request.
For security vulnerabilities, please see our Security Policy.
Documentation
CHANGELOG.md - Version history and release notes
CONTRIBUTING.md - How to contribute
SECURITY.md - Security policy and vulnerability reporting
Links
Website: stacksfinder.com
Pricing: stacksfinder.com/pricing
MCP Registry: registry.modelcontextprotocol.io (Official Anthropic)
Discord: discord.gg/scBHF2EumC
Related
CLI: create-stacksfinder — Scaffold projects from terminal
Website: stacksfinder.dev — Full web experience
License
MIT
Available Tools
10 toolsanalyze_techAnalyze TechnologyBRead-only
Detailed analysis of a technology with 6-dimension scores, strengths, weaknesses, and compatible technologies.
| Name | Required | Description | Default |
|---|---|---|---|
| technology | Yes | Technology ID to analyze | |
| context | No | Context for scoring |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, covering safety and scope. The description adds value by specifying the analysis outputs (scores, strengths, weaknesses, compatible technologies), but doesn't disclose additional behavioral traits like rate limits, authentication needs, or what '6-dimension scores' entail.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core purpose and lists key outputs without unnecessary words. Every element (analysis, scores, strengths, weaknesses, compatible technologies) earns its place by clarifying the tool's function.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has annotations covering safety and scope, and schema coverage is 100%, the description adequately explains what the tool does. However, without an output schema, the description could better detail the return format (e.g., structure of '6-dimension scores'), and it lacks usage context compared to siblings.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both parameters well-documented in the schema. The description doesn't add any meaning beyond what the schema provides about 'technology' and 'context', so it meets the baseline for high schema coverage without compensating with extra details.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool performs 'Detailed analysis of a technology' with specific outputs (6-dimension scores, strengths, weaknesses, compatible technologies), providing a specific verb+resource. However, it doesn't explicitly differentiate from sibling tools like 'compare_techs' or 'list_technologies', which prevents a perfect score.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives like 'compare_techs' or 'recommend_stack', nor does it mention prerequisites or exclusions. The context parameter hints at different use cases but isn't explained in the description itself.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
compare_techsCompare TechnologiesBRead-only
Side-by-side comparison of 2-4 technologies with per-dimension winners and compatibility matrix.
| Name | Required | Description | Default |
|---|---|---|---|
| technologies | Yes | Technologies to compare | |
| context | No | Context for scoring |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the agent knows this is a safe, closed-world read operation. The description adds useful context about the output format ('per-dimension winners and compatibility matrix'), but doesn't disclose behavioral traits like rate limits, authentication needs, or what 'closed-world' means in practice beyond what annotations provide.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core functionality and includes key constraints (2-4 technologies) and output details. Every word earns its place with zero waste or redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a read-only comparison tool with good annotations and full schema coverage, the description is adequate but has gaps. It explains the output format but doesn't clarify how 'winners' are determined or what dimensions are compared. Without an output schema, more detail about return values would be helpful, though annotations cover the safety profile sufficiently.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema fully documents both parameters (technologies array with constraints, context enum). The description adds no additional parameter semantics beyond what's in the schema - it doesn't explain what 'per-dimension winners' means in relation to parameters or provide examples of technology names. Baseline 3 is appropriate when schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool performs a 'side-by-side comparison of 2-4 technologies' with specific outputs ('per-dimension winners and compatibility matrix'), which is a specific verb+resource combination. However, it doesn't explicitly differentiate from sibling tools like 'analyze_tech' or 'recommend_stack', which might have overlapping functionality.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives like 'analyze_tech' or 'recommend_stack'. It mentions the 2-4 technology constraint and context parameter, but doesn't explain when this comparison is appropriate versus other analysis or recommendation tools in the sibling list.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_blueprintCreate BlueprintA
Creates a new tech stack blueprint for a project. Requires API key with 'blueprint:write' scope.
The blueprint generation is asynchronous. By default, this tool waits for completion and returns the full blueprint. Set waitForCompletion=false to get the job ID immediately for manual polling.
Example usage:
Create a SaaS MVP: projectType="saas", scale="mvp", priorities=["time-to-market", "cost-efficiency"]
Create an enterprise API: projectType="api", scale="enterprise", priorities=["security", "scalability"]
| Name | Required | Description | Default |
|---|---|---|---|
| projectName | No | Project name (optional) | |
| projectType | Yes | Type of project | |
| scale | Yes | Project scale | |
| projectDescription | No | Brief description (optional) | |
| priorities | No | Top 3 priorities (optional) | |
| constraints | No | Technology constraint IDs (optional) | |
| waitForCompletion | No | Wait for completion (default: true) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds significant behavioral context beyond annotations: it discloses the asynchronous nature of blueprint generation, the default synchronous waiting behavior, the option for manual polling, and authentication requirements. Annotations only indicate it's not read-only, not open-world, and not destructive, so the description provides crucial operational details.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is efficiently structured: the first sentence states the core purpose, followed by key behavioral details, then practical examples. Every sentence serves a distinct purpose without redundancy, making it easy to parse and understand quickly.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (asynchronous creation with configurable waiting), lack of output schema, and rich annotations, the description is complete. It covers purpose, behavior, authentication, usage patterns, and examples, providing all necessary context for an agent to invoke it correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 100% schema description coverage, the baseline is 3. The description adds value through concrete usage examples that illustrate how parameters like projectType, scale, and priorities combine in real scenarios (e.g., 'SaaS MVP' or 'enterprise API'), providing semantic context beyond the schema's technical definitions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Creates a new tech stack blueprint') and resource ('for a project'), distinguishing it from siblings like get_blueprint (read) or analyze_tech (analysis). It precisely communicates the tool's function without ambiguity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context about when to use this tool (creating blueprints) and mentions prerequisites (API key with 'blueprint:write' scope). However, it doesn't explicitly contrast with alternatives like recommend_stack or compare_techs, which prevents a perfect score.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_blueprintGet BlueprintBRead-only
Fetches an existing blueprint by ID. Blueprints are generated via the StacksFinder web UI. Requires API key.
| Name | Required | Description | Default |
|---|---|---|---|
| blueprintId | Yes | Blueprint UUID |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, covering safety and scope. The description adds value by specifying the API key requirement and that blueprints are generated via the web UI, but doesn't disclose additional behavioral traits like rate limits, error handling, or response format. No contradiction with annotations exists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the core purpose in the first sentence, followed by two additional sentences that add context. It's appropriately sized with no redundant information, though it could be slightly more structured for optimal clarity.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (1 parameter, no output schema) and rich annotations, the description is adequate but lacks details on the return value or error conditions. It covers the basics but doesn't fully compensate for the absence of an output schema, leaving gaps in understanding the tool's full behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% description coverage, with the single parameter 'blueprintId' documented as a 'Blueprint UUID'. The description doesn't add any parameter-specific details beyond what the schema provides, such as format examples or validation rules, so it meets the baseline for high schema coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('fetches') and resource ('an existing blueprint by ID'), making the purpose unambiguous. However, it doesn't explicitly differentiate from sibling tools like 'list_technologies' or 'create_blueprint', which would require a more specific scope statement to earn a 5.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage by mentioning 'blueprints are generated via the StacksFinder web UI' and 'requires API key', providing some context. However, it lacks explicit guidance on when to use this tool versus alternatives like 'list_technologies' or 'create_blueprint', and doesn't specify prerequisites beyond the API key.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
list_api_keysList API KeysARead-only
Lists your StacksFinder API keys. Requires a configured API key.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, covering safety and scope. The description adds valuable context by specifying the prerequisite ('Requires a configured API key'), which is not captured in annotations, enhancing transparency about authentication needs.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, front-loaded with the core purpose followed by a prerequisite. Every word earns its place, with no redundancy or unnecessary elaboration, making it highly efficient and well-structured.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (0 parameters, no output schema) and rich annotations, the description is mostly complete. It covers purpose and prerequisites, but lacks details on return values (e.g., format of listed keys) and behavioral aspects like pagination or rate limits, which could be useful despite the annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 0 parameters and 100% schema description coverage, the baseline is 4 as there are no parameters to document. The description does not need to add parameter details, and it appropriately focuses on the tool's purpose and prerequisites instead.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Lists') and resource ('your StacksFinder API keys'), distinguishing it from siblings like 'revoke_api_key' (destructive) and 'setup_api_key' (creation). It precisely defines the tool's scope without ambiguity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context by stating 'Requires a configured API key,' indicating a prerequisite for use. However, it does not explicitly mention when to use this tool versus alternatives like 'setup_api_key' or 'revoke_api_key,' nor does it specify exclusions, leaving some guidance implicit.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
list_technologiesList TechnologiesARead-only
Lists all available technology IDs for use with other tools. Essential for discovering valid technology identifiers.
| Name | Required | Description | Default |
|---|---|---|---|
| category | No | Filter by category |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true, openWorldHint=false, and destructiveHint=false, covering safety and scope. The description adds valuable context beyond this: it clarifies that the output is 'technology IDs' (not full technology details) and that these IDs are 'valid' and 'for use with other tools,' which helps the agent understand the tool's role in a workflow. No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two concise sentences that are front-loaded with the core purpose. Every word earns its place: the first sentence states what it does, and the second explains why it's important, with no redundant or vague phrasing.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's low complexity (one optional parameter), rich annotations, and 100% schema coverage, the description is mostly complete. It clarifies the output format ('technology IDs') and their purpose, though it doesn't detail the return structure (e.g., list format), which is a minor gap since there's no output schema. For a simple list tool, this is sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% description coverage, with the single parameter 'category' fully documented in the schema (including enum values and description). The description does not add any parameter-specific information beyond what the schema provides, so it meets the baseline of 3 for high schema coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
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 ('Lists') and resource ('all available technology IDs'), and explicitly distinguishes it from siblings by noting it's 'for use with other tools' and 'essential for discovering valid technology identifiers.' This differentiates it from analysis, comparison, or recommendation tools in the sibling list.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides explicit guidance on when to use this tool: 'for use with other tools' and 'essential for discovering valid technology identifiers.' It implies an alternative approach (not using this tool) would lack valid IDs, and it distinguishes usage from siblings like analyze_tech or recommend_stack by focusing on ID discovery rather than analysis or recommendation.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
recommend_stackRecommend StackBRead-only
Recommends the best tech stack for a project using real-time scoring with context adjustments. Requires API key.
| Name | Required | Description | Default |
|---|---|---|---|
| projectType | Yes | Type of project | |
| scale | No | Project scale | |
| priorities | No | Top priorities (max 3) | |
| constraints | No | Project constraints |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, indicating a safe, non-destructive read operation with limited scope. The description adds value by specifying 'real-time scoring with context adjustments,' which suggests dynamic behavior beyond a simple lookup, and notes the API key requirement, addressing authentication needs. However, it doesn't detail rate limits, output format, or other behavioral traits, so it partially compensates for the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise and front-loaded: it states the core purpose in the first clause and adds a critical prerequisite in the second. Every sentence earns its place with no wasted words, making it efficient and easy to parse for an agent.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (4 parameters, real-time scoring) and lack of output schema, the description is somewhat incomplete. It covers the basic purpose and authentication need but doesn't explain the return values, scoring methodology, or how context adjustments work. With annotations providing safety context, it's minimally adequate but leaves gaps for a recommendation tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with all parameters well-documented in the schema (e.g., projectType, scale, priorities, constraints). The description doesn't add any parameter-specific semantics beyond what's in the schema, such as explaining how 'constraints' affect recommendations. Given the high coverage, a baseline score of 3 is appropriate, as the schema handles the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: 'Recommends the best tech stack for a project using real-time scoring with context adjustments.' It specifies the verb ('recommends'), resource ('tech stack'), and method ('real-time scoring with context adjustments'), but doesn't explicitly differentiate from siblings like 'analyze_tech' or 'compare_techs', which likely serve different purposes. This makes it clear but not fully sibling-aware.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides minimal usage guidance: it only states 'Requires API key' as a prerequisite. There's no explicit guidance on when to use this tool versus alternatives like 'recommend_stack_demo' or other siblings, nor any context on exclusions or specific scenarios. This leaves the agent with little direction on tool selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
recommend_stack_demoRecommend Stack (Demo)ARead-only
Try StacksFinder's tech stack recommendations for FREE - once per day, no account required.
Returns the optimal technology for each category based on deterministic scoring. For unlimited access, priorities, constraints, and AI-generated narratives, upgrade to Pro at https://stacksfinder.com/pricing
| Name | Required | Description | Default |
|---|---|---|---|
| projectType | Yes | Type of project | |
| scale | No | Project scale |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, covering safety and scope. The description adds useful context about the 'once per day' rate limit and 'no account required' authentication aspect, which aren't in the annotations. However, it doesn't describe output format or error behavior. With annotations providing core safety info, a 3 is appropriate as the description adds some behavioral details.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is efficiently structured in two sentences: the first covers purpose and limitations, the second contrasts with Pro features. Every sentence adds value without redundancy, making it appropriately sized and front-loaded with essential information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's moderate complexity (2 parameters with enums), annotations covering safety, and no output schema, the description is mostly complete. It explains the tool's purpose, usage limits, and upgrade path. However, it lacks details on the return format (e.g., structure of recommendations), which would be helpful since there's no output schema.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both parameters having clear enum-based descriptions. The description doesn't add any parameter-specific information beyond what the schema provides (e.g., how projectType and scale affect recommendations). Since the schema fully documents parameters, the baseline score of 3 is applied.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool provides 'tech stack recommendations' and returns 'optimal technology for each category based on deterministic scoring,' which specifies the verb (recommend) and resource (technology stacks). However, it doesn't explicitly differentiate from sibling tools like 'recommend_stack' or 'analyze_tech,' which appears to be a similar recommendation tool without the demo limitation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly states 'once per day, no account required' and contrasts this with 'unlimited access, priorities, constraints, and AI-generated narratives' available via a Pro upgrade. This provides clear when-to-use guidance (free, limited use) and when-not-to-use (when more features are needed), with an alternative (upgrading to Pro) mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
revoke_api_keyRevoke API KeyADestructive
Revokes an API key. This action cannot be undone.
| Name | Required | Description | Default |
|---|---|---|---|
| keyId | Yes | The UUID of the API key to revoke |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate destructiveHint=true, so the agent knows this is a destructive operation. The description adds valuable context by explicitly stating 'This action cannot be undone,' reinforcing the irreversible nature beyond the annotation. It does not contradict annotations, as 'revokes' aligns with destructiveHint=true and readOnlyHint=false.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is extremely concise—two short sentences that are front-loaded with the core action and followed by a critical warning. Every word earns its place, with no redundancy or unnecessary information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (a destructive, irreversible action with one parameter) and the presence of annotations (destructiveHint=true), the description is mostly complete. It covers the irreversible nature, but without an output schema, it does not explain return values or potential errors, leaving a minor gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% description coverage, with the 'keyId' parameter fully documented as 'The UUID of the API key to revoke.' The description does not add any further meaning or details about the parameter beyond what the schema provides, so it meets the baseline for high schema coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('revokes') and the resource ('an API key'), making the purpose specific and unambiguous. It distinguishes this tool from sibling tools like 'list_api_keys' or 'setup_api_key' by focusing on revocation rather than listing or creation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context by stating 'This action cannot be undone,' which implies when to use it—specifically, for irreversible revocation. However, it does not explicitly mention when not to use it or name alternatives, such as using 'list_api_keys' first to verify the key ID.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
setup_api_keySetup API KeyA
Authenticates with your StacksFinder account and creates an API key. Requires Pro or Team tier. The key is returned once and should be saved securely.
| Name | Required | Description | Default |
|---|---|---|---|
| Yes | Your StacksFinder account email | ||
| password | Yes | Your StacksFinder account password | |
| keyName | No | Optional name for the API key |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate this is a non-destructive write operation (readOnlyHint: false, destructiveHint: false). The description adds valuable behavioral context beyond annotations: it discloses that the key is returned only once and should be saved securely, which are critical implementation details not captured in structured fields.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the core purpose and efficiently conveys essential information in just two sentences. Every sentence earns its place: the first explains the action and prerequisites, while the second provides critical behavioral guidance about key security.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool that creates credentials with no output schema, the description is reasonably complete. It covers the purpose, prerequisites, and key behavioral aspects (one-time return, security). However, it could mention what happens on failure (e.g., invalid credentials) or the format of the returned key, which would enhance completeness.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema fully documents all three parameters (email, password, keyName). The description doesn't add any parameter-specific semantics beyond what the schema provides, such as explaining the format of keyName or authentication requirements. Baseline 3 is appropriate when the schema handles parameter documentation.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the specific action ('Authenticates... and creates an API key') and resource ('your StacksFinder account'), distinguishing it from sibling tools like list_api_keys or revoke_api_key. It goes beyond just restating the name/title by explaining the authentication and key creation process.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides clear context for when to use this tool ('Requires Pro or Team tier'), which helps differentiate it from alternatives. However, it doesn't explicitly state when NOT to use it (e.g., if you already have an API key) or name specific alternatives like list_api_keys for checking existing keys.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
TDQS
Most tools have distinct purposes, such as analyze_tech for detailed analysis, compare_techs for comparisons, and create_blueprint for generating stacks. However, recommend_stack and recommend_stack_demo overlap in functionality, with the demo version being a limited free alternative, which could cause confusion for agents about which to use in different contexts.
All tool names follow a consistent snake_case pattern with clear verb_noun structures, such as analyze_tech, compare_techs, create_blueprint, and list_technologies. This uniformity makes the tool set predictable and easy for agents to navigate without naming conflicts.
With 10 tools, the count is well-scoped for a tech stack recommendation server, covering key operations like analysis, comparison, blueprint creation, and API management. Each tool serves a specific role without redundancy, fitting the domain's complexity appropriately.
The tool set provides comprehensive coverage for tech stack evaluation, including analysis, comparison, recommendation, and blueprint management. A minor gap exists in update or delete operations for blueprints or API keys, but core workflows are fully supported, allowing agents to perform essential tasks effectively.
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